Answer:
f(x) = x² - 10x + 22
Step-by-step explanation:
Let's assume the quadratic polynomial as:
f(x) = ax² + bx + c
Now we know that if one of the zeroes is 5 + √3, then the other zero must be 5 - √3 (because complex roots always come in conjugate pairs).
So the sum of the zeroes will be:
(5 + √3) + (5 - √3) = 10
10 = 2 * 5
The product of the zeroes will be:
(5 + √3) * (5 - √3) = 25 - 3 = 22
Now, using the sum and product of zeroes, we can write:
b/a = 10
c/a = 22
Solving for b and c, we get:
b = -10a
c = 22a
Substituting these values in f(x), we get:
f(x) = a(x - 5 - √3)(x - 5 + √3)
Expanding the right-hand side:
f(x) = a[(x - 5)² - (√3)²]
f(x) = a(x² - 10x + 22)
Comparing the coefficients of f(x) with ax² + bx + c, we get:
a = 1, b = -10, c = 22
Therefore, the quadratic polynomial is:
f(x) = x² - 10x + 22
You have a second job that pays $8.50/hr and your deductions are fica ((7.65%), federal tax withholding (11.25%),and tax withholding (7.25%). If you want to save $220/month), how many many hours do you need to work at your second job? (Remember to round up to the nearest whole hour.)
To save $220 per month while working a job that pays $8.50 per hour with deductions of 26.15%, you would need to work approximately 43 hours per month, rounded up to the nearest whole hour.
To calculate how many hours you would need to work, you need to first determine your hourly pay after deductions. To do this, subtract the percentage of deductions (26.15%) from 100% (100% - 26.15% = 73.85%). Then, multiply your hourly rate by this percentage to get your effective hourly rate after deductions: $8.50 x 0.7385 = $6.27.
To save $220 per month, you need to earn at least $220 more than your expenses from your second job. Assuming a 4-week month, your expenses would need to be at most $55 per week ($220/4 weeks = $55/week).
To earn $55 per week, you need to work for $55/$6.27 = 8.77 hours per week. Rounded up to the nearest whole hour, you would need to work approximately 9 hours per week.
Multiplying this by 4 weeks gives you a total of 36 hours. However, since you need to earn slightly more than $55 per week to account for taxes and rounding, you would need to work approximately 43 hours per month.
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a research methods professor creates a computer tutor to help students understand confounding and obscuring variables. before the second exam in the class, volunteers are randomly assigned to either interact with the computer tutor on the materials or to play angry birds on the computer for an equivalent time (30 minutes). although the students in the tutor group do significantly better on the exam the following day, many of the practice questions from the tutor are exactly the same as those on the exam. what is the main threat to concluding that the tutor was effective?
The main threat to concluding that the tutor was effective in helping students understand confounding and obscuring variables is the issue of 'practice effects'.
Practice effects occur when exposure to specific materials or questions during a study can artificially inflate performance on subsequent measures, such as an exam.
In this case, if the practice questions from the tutor were exactly the same as those on the exam.
Then the students who interacted with the tutor may have had an advantage on the exam .
Due to familiarity with the questions rather than a true understanding of the material.
The use of the same practice questions in the tutor and on the exam .
It represents a potential confounding variable that could affect the interpretation of the results.
It is possible that the tutor may have been effective.
But it is also possible that the practice effect of the repeated questions contributed to the observed improvement in performance.
Future research could use different practice questions in the tutor and on the exam.
Use a different exam altogether to assess performance.
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2) The President asks you to find the equilibrium level of output for the economy. Suppose you are given that government spending is $10000, investment is $7500, autonomous spending is $2000, the marginal propensity to consume is. 8, and, finally, the level of net exports is -$1000. Now, suppose exports grow by $1000 (Net exports are now $0. ), What would be the equilibrium level of output? What was the multiplier in this case?
The equilibrium level of output in the economy can be calculated using the following formula:
Y = C + I + G + NX
Where:
Y = Equilibrium level of output
C = Consumption
I = Investment
G = Government spending
NX = Net exports
We can calculate consumption using the marginal propensity to consume (MPC) and autonomous spending (A):
C = MPC(Y - T) + A
Where:
T = Taxes (assumed to be 0 in this case)
Substituting in the given values:
C = 0.8(Y - 0) + 2000
C = 0.8Y + 2000
Substituting in the given values for investment, government spending, and net exports:
Y = 0.8Y + 2000 + 7500 + 10000 - 1000
Y = 0.8Y + 19500
Solving for Y:
0.2Y = 19500
Y = 97500
Therefore, the equilibrium level of output in the economy is $97,500.
If net exports increase by $1000, then the new value of net exports (NX) is 0.
Substituting the new value of NX into the formula:
Y = 0.8Y + 2000 + 7500 + 10000 - 0
Y = 0.8Y + 19500
Solving for Y:
0.2Y = 19500
Y = 97500
Therefore, the equilibrium level of output in the economy is still $97,500.
The multiplier is calculated as:
Multiplier = 1 / (1 - MPC)
Substituting in the value of MPC:
Multiplier = 1 / (1 - 0.8)
Multiplier = 5
Therefore, the multiplier in this case is 5.
3
Select the correct answer.
The angle of depression between the top of a 100-foot cliff and a ship approaching the shore is 37°.
cliff top
37°
100
feet
37°
ship
d
What is the approximate distance, d, between the bottom of the cliff and the ship?
ÐÐ
166. 2 feet
OB. 60. 2 feet
ÐС.
75. 4 feet
OD.
132. 7 feet
Reset
Next
The correct answer is (D) 132.7 feet.
From the given information, we can draw a diagram as follows:
A
/|
/ |
/ | 37°
/ |
/ |
/ |
/ |
/_ _ _ _|
d B
Where A represents the top of the cliff, B represents the ship and d represents the distance between the ship and the bottom of the cliff.
Since we know that the angle of depression is 37 degrees, then the angle CAB is also 37 degrees. We also know that AB is 100 feet, which is the height of the cliff. We want to find the distance d between the bottom of the cliff and the ship.
We can use the tangent function to find d:
tan(37°) = AB/BD
tan(37°) = 100/d
d = 100/tan(37°)
Using a calculator, we can find that:
d ≈ 132.7 feet
Therefore, the correct answer is (D) 132.7 feet.
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If Mikal uses all his money to buy one type of flour, he has exactly enough money to buy either 12 pounds of wheat flour, or 6 pounds of rice flour, or 4 pounds of almond flour. If Mikal uses all his money to buy an equal number of pounds of all three types of flour, what is the total number of pounds of flour that he can buy?
The total number of pounds of flour he can buy is 7 pounds of flour
Let's assume that Mikal has $1 to spend on flour. According to the problem, he can buy:
- 12 pounds of wheat flour for $1, which means that the price of wheat flour is 1/12 = $0.0833 per pound.
- 6 pounds of rice flour for $1, which means that the price of rice flour is 1/6 = $0.1667 per pound.
- 4 pounds of almond flour for $1, which means that the price of almond flour is 1/4 = $0.25 per pound.
If Mikal spends $1 on an equal amount of all three types of flour, he will spend $1/3 = $0.3333 on each type of flour. To determine how many pounds of each type of flour he can buy, we need to divide $0.3333 by the respective price per pound of each type of flour:
- Wheat flour: $0.3333 / $0.0833 per pound = 3.9996 pounds (rounded to 4 pounds)
- Rice flour: $0.3333 / $0.1667 per pound = 1.9998 pounds (rounded to 2 pounds)
- Almond flour: $0.3333 / $0.25 per pound = 1.3332 pounds (rounded to 1 pound)
Therefore, Mikal can buy 4 pounds of wheat flour, 2 pounds of rice flour, and 1 pound of almond flour with $1. The total number of pounds of flour he can buy is:
4 + 2 + 1 = 7 pounds of flour.
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Congruent figures M and M’ are shown on the coordinate grid below. Describe a sequence of transformations on rectangle M that would result in figure M’? Responses A Reflection over the y axis, then translation down 5 units.Reflection over the y axis, then translation down 5 units. B Reflection over the y axis, then translation up 5 units. Reflection over the y axis, then translation up 5 units. C Reflection over the x axis, then translation up 5 units.Reflection over the x axis, then translation up 5 units. D Reflection over the x axis, then translation down 5 units.
o, the correct sequence of transformations that would result in figure M' is: A) Reflection over the y-axis, then translation down 5 units.
What is transformation?In mathematics, a transformation is a process that changes the position, size, or shape of a geometric figure. Transformations are often used to study the properties of geometric objects and to solve problems in various areas of mathematics, such as geometry, algebra, and calculus.
Here,
Looking at the coordinates of the vertices of M and M', we can see that M' is obtained from M by reflecting it over the y-axis and then translating it down 5 units. So, the correct sequence of transformations that would result in figure M' is:
A) Reflection over the y-axis, then translation down 5 units.
This means that we first reflect M over the y-axis to obtain a new rectangle, which we can call M''. Then, we translate M'' down 5 units to obtain M'. Therefore, the sequence of transformations is:
Reflection over the y-axis
Translation down 5 units
This sequence of transformations will map M onto M'.
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PLEASE HELP ME 20 BRAINLEIST
Abdul flips a weighted coin 64 times and gets 16 tails. Based on experimental probability, how many of the next 40 flips should Abdul expect to come up tails?
Based on experimental probability, Abdul should expect 10 tails in the next 40 flips.
The experimental probability of getting tails is calculated as the ratio of the number of tails obtained in the experiment to the total number of coin flips.
In this case, the experimental probability of getting tails is 16/64, which simplifies to 1/4 or 0.25.
This means that in the long run, we would expect approximately 25% of coin flips to result in tails.
To determine how many of the next 40 flips Abdul should expect to come up tails based on experimental probability,
we can multiply the experimental probability by the total number of flips.
Abdul should expect 0.25 × 40 = 10 tails in the next 40 flips.
Experimental probability of getting tails = Number of tails obtained / Total number of coin flips
Experimental probability of getting tails = 16/64
Experimental probability of getting tails = 0.25 or 25%
Expected number of tails in the next 40 flips = Experimental probability of getting tails × Total number of flips
Expected number of tails in the next 40 flips = 0.25×40 = 10 tails
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HERE IS A HARD QUESTION , COULD U PLEASE ANSWER B PLEASE? I DID A ! 1ST ANSWER WOULD BE MARKED BRAINLIEST AND GET 5/5 WITH A THANKS! ILL ALSO COMMENT ON YOUR ANSWER ! BUT IF IT ISNT CORRECT , I WONT MARK BRAINLIEST! Thank you for your answers!!!!
Step-by-step explanation:
The coordinates of point B: (0,6)
Coordinates of point C: (3,8)
A kite has 4 sides, of which we have 2 equal pairs, thus the coordinates of point D must be (6,6)
Answer:
(6,6)
Step-by-step explanation:
The question is asking us to complete the half figure, and make it a kite. We can see that the 2 lines AB and BC are half of the shape. In the attachment, I drew a line of symmetry down the middle of the shape.
I also created a point, Y, down the red line, AC, to represent the perpendicular bisector of the 2 diagonals. We can see that line segment BY is the radius of the entire line BD.
This radius is 3 units, so we now know that the diameter horizontally is 6 units. We can draw this on the other side to create point D.
This means that point D is at (6,6).
See attachment for more information, hope this helps!
TJ’s drawer has many loose socks: 5 gray, 5 black, and 6 white. If two socks are randomly pulled out without replacement, what is the probability that he pulls 2 white socks?
The probability of TJ pulling 2 white socks is 0.125 or 12.5%.
What is the probability that TJ pulls 2 white socks?There are 16 socks in total, so the probability of the first sock being white is 6/16.
Since we are not replacing the first sock, there are now 15 socks left, including 5 white socks.
So the probability of the second sock being white, given that the first sock was white, is 5/15.
To find the probability of both events occurring, we multiply the probabilities:
P(white and white) = P(white on first draw) × P(white on second draw, given that the first was white)
P(white and white) = (6/16) × (5/15)
P(white and white) = 1/8
So the probability of pulling 2 white socks is 1/8 or approximately 0.125.
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You dog just had a litter of 9 puppies. Your mom is going to let you keep 2 of them. How many possible outcomes are there?
In a game, each player receives 7 cards from a deck of 52 different cards. How many different groupings of cards are possible in this game?
How many possible outcomes are there for a 4 digit ATM pin if the first number must be a 5?
How many three letter arrangements can be made from the letters in the word ocean?
Puppy outcomes: 36. Card groupings: 133,784,560. 5-digit PINs: 1,000. Three-letter arrangements: 24.
How many possible outcomes?
a) For the puppies, you have 9 choices for the first puppy and 8 choices for the second puppy. However, since the order in which you choose them does not matter (e.g., getting puppy A first and then puppy B is the same as getting puppy B first and then puppy A), we need to divide by the number of ways to arrange 2 items, which is 2! (2 factorial). Therefore, the number of possible outcomes is 9 * 8 / 2! = 36.
b) For the card game, each player receives 7 cards from a deck of 52 cards. The number of different groupings of cards can be calculated using combinations. The formula for combinations is nCr = n! / (r!(n-r)!), where n is the total number of cards (52) and r is the number of cards each player receives (7). Plugging in the values, we get 52C7 = 52! / (7!(52-7)!) = 133,784,560.
c) For the 4-digit ATM pin, the first number must be 5. The remaining three digits can be chosen from the numbers 0-9, excluding 5 (since it has already been chosen for the first digit). Therefore, there are 9 choices for the second digit, 10 choices for the third digit, and 10 choices for the fourth digit. Multiplying these choices together, we get 9 * 10 * 10 = 900 possible outcomes.
d) For the three-letter arrangements from the word "ocean," we have 5 letters to choose from. The first letter can be any of the 5 letters, the second letter can be any of the remaining 4 letters, and the third letter can be any of the remaining 3 letters. Multiplying these choices together, we get 5 * 4 * 3 = 60 possible arrangements.
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Patricia bought 4 apples and 9 bananas for $12. 70 Jose bought 8 apples and I bananas for $17. 70 at the same grocery store What is the cost of one apple?
Let's denote the cost of one apple as 'a' and the cost of one banana as 'b'. We can set up a system of two equations to represent the given information:
4a + 9b = 12.70 (equation 1)
8a + b = 17.70 (equation 2)
We can use either substitution or elimination method to solve for 'a' or 'b'. Let's use the elimination method by multiplying equation 2 by 9 and subtracting it from equation 1:
4a + 9b = 12.70
-(72a + 9b = 159.30) (multiplying equation 2 by 9)
------------------
-68a = -146.60
Dividing both sides by -68, we get:
a ≈ 2.16
Therefore, the cost of one apple is approximately $2.16.
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Buying three movie tickets and a popcorn, which costs $5.50, is the same price as buying two tickets snacks worth a total of 16.50. How much does one movie ticket cost
If buying three movie tickets and a popcorn, which costs $5.50, is the same price as buying two tickets snacks worth a total of 16.50, one movie ticket costs $2.20.
Let the cost of one movie ticket be represented by x.
According to the problem, buying three movie tickets and a popcorn costs $5.50, so we can set up the equation:
3x + $5.50 = 2y
where y is the cost of snacks.
Similarly, buying two tickets and snacks worth a total of $16.50 can be represented by the equation:
2x + y = $16.50
We can solve this system of equations by substituting the first equation into the second equation for y:
2x + (3x + $5.50) = $16.50
5x + $5.50 = $16.50
5x = $11
x = $2.20
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Why couldn’t Anybody see Ms Applebees apple?
Ms. Applebee's apple is because they lacked the necessary human capital to understand the play on words.
To begin with, let's define what we mean by capital. In economics, capital refers to any resource that can be used to produce goods or services. This can include physical capital, such as machinery and equipment, as well as financial capital, such as money and investments.
However, there is another type of capital that is just as important: human capital. Human capital refers to the skills, knowledge, and abilities that individuals possess, which can be used to create economic value. This can include things like education, training, and experience.
This is where the concept of human capital comes in. In order to "see" Ms. Applebee's apple (or capital), you need to have the skills and knowledge to understand the play on words. This requires a certain level of human capital - specifically, linguistic and cultural capital.
Linguistic capital refers to the ability to use language effectively, including understanding and interpreting language in different contexts. Cultural capital, on the other hand, refers to the knowledge and skills needed to navigate different cultural contexts and understand cultural references.
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Use The Fundamental Theorem of Calculus, Part 2 to evaluate / - (13 – 12) dt.
The value of the integral [tex]\int -1^1 (13 - 12) dt[/tex] is 26.
How to evaluate the integral?To evaluate the integral [tex]\int-1^1 (13 - 12) dt[/tex] , we need to find an antiderivative of the integrand, which is simply:
∫ (13 - 12) dt = 13t - 12
Using this antiderivative, we can evaluate the definite integral by applying the theorem:
[tex]\int-1^1 (13 - 12) dt = [13t - 12]_{(-1)^1[/tex]
Evaluating this expression at the limits of integration (-1 and 1), we get:
[13(1) - 12] - [13(-1) - 12]
Simplifying, we get:
= 13 - 12 + 13 + 12
= 26
Therefore, the value of the integral [tex]\int-1^1 (13 - 12) dt[/tex] is 26.
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there are 882 plastic beads and 18 metal beads on clearance. What percentage of the beads on clearance are plastic? Write your answer using a percent sign (%).
The percentage of plastic beads on clearance is 98.99%.
What percent of the clearance beads are plastic, if there are 882 plastic beads and 18 metal beads? express your answer in percent sign (%)?To calculate the percentage of plastic beads on clearance, you need to divide the number of plastic beads by the total number of beads and then multiply by 100 to get the percentage.
In this case, the total number of beads on clearance is the sum of plastic beads and metal beads:
In this question, you are given the number of plastic beads and metal beads on clearance, and you are asked to find the percentage of plastic beads.
To do this, you need to calculate the total number of beads on clearance by adding the number of plastic beads and the number of metal beads.
Once you have the total number of beads, you can find the percentage of plastic beads by dividing the number of plastic beads by the total number of beads.
And then multiplying by 100 to convert the answer into a percentage. This formula can be expressed as:
Percentage of plastic beads = (Number of plastic beads / Total number of beads) x 100%
Plugging in the given values, we get:
Total number of beads = 882 + 18 = 900
Percentage of plastic beads = (882 / 900) x 100% = 98.99%
So, the answer is that 98.99% of the beads on clearance are plastic.
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An air conditioner is priced at $900. Amirah buys the air conditioner on hire purchase according to the following terms: downpayment of 20% and the remaining to be paid in monthly installments over 4 years at a simple interest rate of 10% per annum.
i) Find her monthly installment
ii) Find the total amount Amirah pays for the air conditioner.
iii) How much more does she have to pay for buying the air conditioner on hire purchase?
The monthly installment of the air conditioner is $ 21 and the total amount paid for the air conditioner is $ 1188. She has to pay $ 288 more for buying the air conditioner on hire purchase.
Original cost = $900
Downpayment = 20%
Downpayment = 20% of 90
= 0.20 * 900
=$180
For simple interest,
A = P + P * r * t
where A is the amount
P is the principal
r is the rate of interest
t is the time
Given,
P = Total cost - Downpayment
= 900 - 180
= $720
r = 10%
t = 4 years
A = 720 + 720 * 0.10 * 4
= $ 1008
Number of months she has to pay = 4 * 12
= 48 months
Monthly installment = 1008 / 48
= $ 21
Total amount paid = Downpayment + Monthly installments
= 180 + 1008
= $ 1188
Money paid more = 1188 - 900
= $ 288
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At the school bookstore, Rylan bought two spiral notebooks and one folder and paid $6. 70. Olivia bought three spiral notebooks and five folders and paid $12. 85. Find the cost of each folder
To find the cost of each folder, we need to first set up a system of equations based on the given information. Let x be the cost of a spiral notebook and y be the cost of a folder. We can create the following equations:
1) 2x + y = $6.70 (Rylan's purchase)
2) 3x + 5y = $12.85 (Olivia's purchase)
First, we can solve equation 1 for y:
y = $6.70 - 2x
Next, substitute this expression for y into equation 2:
3x + 5($6.70 - 2x) = $12.85
Now, solve for x:
3x + $33.50 - 10x = $12.85
Combine like terms:
-7x = -$20.65
Now, divide by -7:
x = $2.95
Now that we know the cost of a spiral notebook, we can plug this value back into the expression we found for y:
y = $6.70 - 2($2.95)
y = $6.70 - $5.90
y = $0.80
So, the cost of each folder is $0.80.
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16. Justin is joining a gym. The gym is currently offering a discount on the fee to join and on the monthly rate.
The discounted price,in dollars,the gym charges can be represented by the equation y=10x+5
a. What are the slope and the Y-intercept of the equation? What do the slope and the Y-intercept each represent in this equation?
Answer:
The equation y = 10x + 5 is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.
The equation y = 10x + 5 is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.Slope (m) = 10
The equation y = 10x + 5 is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.Slope (m) = 10Y-intercept (b) = 5
The equation y = 10x + 5 is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.Slope (m) = 10Y-intercept (b) = 5The slope represents the rate of change of the monthly rate with respect to the fee to join. For every increase of $1 in the fee to join, the monthly rate increases by $10.
The equation y = 10x + 5 is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.Slope (m) = 10Y-intercept (b) = 5The slope represents the rate of change of the monthly rate with respect to the fee to join. For every increase of $1 in the fee to join, the monthly rate increases by $10.The y-intercept represents the initial cost of joining the gym. It is the amount that the gym charges even if the fee to join is $0. In this case, the gym charges $5 to join.
P is directly proportional to (q+2)2
when q = 1, p = 1.
find p when q = 10.
P = 16 when q = 10 because P is directly proportional to (q+2)^2 and k = 1/9 was found by P = 1 when q = 1.
How to find value the of P?If P is directly proportional to (q+2)^2, we can write this as:
P = k(q+2[tex])^2[/tex]
where k is a constant of proportionality.
To find the value of k, we can use the given condition that when q = 1, P = 1:
1 = k(1+2[tex])^2[/tex]
1 = k(3[tex])^2[/tex]
1 = 9k
k = 1/9
Now we can use this value of k to find P when q = 10:
P = (1/9)(10+2[tex])^2[/tex]
P = (1/9)(12[tex])^2[/tex]
P = (1/9)(144)
P = 16
The reason for this answer is based on the given information that P is directly proportional to (q+2[tex])^2[/tex]. Using the proportionality constant k, which was determined by the condition that P = 1 when q = 1.
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The rectangle has a perimeter of 62 millimeters. What is its area?
Let's assume that the length of the rectangle is x and the width is y.
The perimeter of the rectangle is given by:
P = 2x + 2y
Substituting P = 62, we get:
62 = 2x + 2y
Simplifying the above equation, we get:
x + y = 31
The area of the rectangle is given by:
A = xy
To find the area, we need to solve for one of the variables, either x or y. We can use the equation x + y = 31 to solve for y in terms of x:
y = 31 - x
Substituting this expression for y in the equation for the area, we get:
A = x(31 - x)
Expanding the above expression, we get:
A = 31x - x^2
To find the maximum area, we need to find the value of x that maximizes A. We can do this by completing the square:
A = - (x^2 - 31x)
A = - [(x - 15.5)^2 - 240.25]
A = 240.25 - (x - 15.5)^2
The maximum area occurs when x = 15.5, so the dimensions of the rectangle are:
x = 15.5 mm
y = 31 - x = 15.5 mm
The area of the rectangle is:
A = xy = 15.5 mm × 15.5 mm = 240.25 mm^2
Therefore, the area of the rectangle is 240.25 square millimeters.
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what is scientific notation
Drag each tile to its equivalent measure, rounded to the nearest tenth.
19. 810. 222. 715. 4
Measure Equivalent
4 in.
cm
7 kg
lb
6 gal
L
65 ft
m
The given value of 19 is not a unit of measurement, so it cannot be converted to an equivalent measure.
How to drag each tile to its equivalent measure, rounded to the nearest tenth?4 in. - 10.2 cm
7 kg - 15.4 lb
6 gal - 22.7 L
5 ft - 1.5 m
Note: The given value of 19 is not a unit of measurement, so it cannot be converted to an equivalent measure.
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Homework:section 6c homework question 13, 6.c.21 hw score: 60%, 12 of 20 points points: 0 of 1 question content area top part 1 the scores on a psychology exam were normally distributed with a mean of 68 and a standard deviation of 9 . about what percentage of scores were less than 50?
For a normal distribution with a mean of 68 and a standard deviation of 9, the percentage of scores less than 50 is 2.28%.
It is given that scores on a psychology exam have a normal distribution with a mean of 68 and a standard deviation of 9. The percentage of scores less than 50 can be determined as follows.
1. Calculate the z-score for 50 using the formula:
z = (X - μ) / σ
where
X = 50 (the value we're comparing to)
μ = 68 (mean)
σ = 9 (standard deviation)
2. Plug in the values:
z = (50 - 68) / 9 = -18 / 9 = -2
3. Use a z-table or calculator to find the area to the left of z = -2. This represents the percentage of scores less than 50.
4. Based on the z-table or calculator, the area to the left of z = -2 is approximately 0.0228, which means that around 2.28% of scores were less than 50.
So, about 2.28% of scores on the psychology exam were less than 50.
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Nolan ordered a set of beads. He received 86 beads in all. 43 of the beads were orange. What percentage of the beads were orange?
50% of the beads Nolan received were orange.
To find the percentage of beads that were orange, we need to divide the number of orange beads by the total number of beads and then multiply by 100.
Percentage of orange beads = (Number of orange beads / Total number of beads) * 100
In this case, Nolan received a total of 86 beads, and 43 of them were orange.
Percentage of orange beads = (43 / 86) * 100
Calculating this expression:
Percentage of orange beads = 0.5 * 100
Percentage of orange beads = 50%
Therefore, Out of total number of beads Nolan received, 50% were orange.
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Which is the explicit equation that starts at x=0 for the sequence 7, 10, 13,
16,.
1 point
Of(x) = 7x + 3
f(x) = 7(x+1) + 10
Of(x) = 3x + 7
f(x) = 3(x+1)+7
The explicit equation for the sequence 7, 10, 13, 16,... is an = 7 + 3n.
To find the explicit equation for the sequence 7, 10, 13, 16,..., we first need to identify the common difference.The common difference is the difference between any two consecutive terms in the sequence.
In this case, the common difference d is 10 - 7 = 3, 13 - 10 = 3, 16 - 13 = 3, and so on.
Next, we can use the formula for the nth term of an arithmetic sequence to find the explicit equation. The formula is:
an = a1 + (n - 1)d
where,
an = the nth term of the sequence
a1 = the first term of the sequence
d = the common difference
n = the number of the term we want to find
Since the sequence starts at x=0, we can rewrite the formula as: an = a0 + nd,
where a0 = 7 and d = 3.
Therefore, the explicit equation for the sequence is an = 7 + 3n
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Suppose the following set of random numbers is being used to simulate the event of a
basketball player making three free throws in a row. how should the numbers be
rearranged?
i don’t need help but in case someone needs the answer. good luck!
Option D is the correct answer as it groups the numbers into sets of five, assigns them as either a "make" or a "miss", and preserves the order of the original set.
The set of random numbers provided represents the binary outcome of a basketball player making or missing a free throw. To simulate the event of making five free throws in a row, we need to group the numbers into sets of five and assign each set as either a "make" or a "miss".
Option A simply groups the numbers into sets of five, but does not indicate whether they are a "make" or a "miss". Option B groups the numbers into sets of five and assigns them as either a "make" or a "miss", but the order of the numbers has been changed.
Option C groups the numbers into sets of five, assigns them as either a "make" or a "miss", and preserves the order of the original set.
This allows for an accurate simulation of the event of making five free throws in a row using the provided set of random numbers.
So, correct option is D.
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Complete question is:
Suppose the following set of random numbers is being used to simulate the event of a basketball player making five free throws in a row. How should the numbers be rearranged?
860583 785814 010122 337198 621549 034076 796495 978078 433330
333153
A. 860 583 785 814 010 122 337 198 621 549 034 076 796 495 978
078 433 330 333 153
B. 8605 8378 5814 0101 2233 7198 6215 4903 4076 7964 9597
8078 4333 3033 3153
C. 86058 37858 14010 12233 71986 21549 03407 67964 95978
07843 33303 33153
D. 860583 785814 010122 337198 621549 034076 796495 978078
433330 333153
A tabletop in the shape of a trapezoid has an area of 7,701 square centimeters. its longer base measures 119 centimeters, and the shorter base is 85 centimeters. what is the height?
please just give me the answer, don't send me a link i have to open
The height of the given trapezoid-shaped tabletop is 75.5 centimeters.
The height of the trapezoid-shaped tabletop. To calculate the height, we can use the formula for the area of a trapezoid: A = (1/2)(b1 + b2)h, where A is the area, b1 and b2 are the lengths of the bases, and h is the height.
Given the area (A) is 7,701 square centimeters, the longer base (b1) measures 119 centimeters, and the shorter base (b2) is 85 centimeters, we can solve for the height (h) using the following steps:
1. Plug in the given values into the formula: 7,701 = (1/2)(119 + 85)h
2. Simplify the expression inside the parentheses: 7,701 = (1/2)(204)h
3. Multiply the two numbers inside the parentheses: 7,701 = 102h
4. Divide both sides of the equation by 102 to solve for h: h = 7,701 / 102
5. Calculate the value of h: h ≈ 75.5 centimeters
So, the height of the trapezoid-shaped tabletop is approximately 75.5 centimeters.
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If p and q are real numbers in the function f(x)=x4+5x3+px2+qx+30 and f(1)=0, which equation is true?
p + q + 36 = 0 is the equation that is true. From this equation, we can say that p + q = -36.
If we substitute x = 1 in the given function, we get:
f(1) = [tex](1)^4 + 5(1)^3 + p(1)^2 + q(1) + 30[/tex]
= 1 + 5 + p + q + 30
= p + q + 36
We are given that f(1) = 0. Therefore, we have:
p + q + 36 = 0
This is the equation that is true. From this equation, we can say that p + q = -36.
Now, let's see why this is the case. When we substitute x = 1 in the given function and get f(1) = 0, it means that (1, 0) is a point on the graph of the function. This point lies on the x-axis, which means that the function intersects the x-axis at x = 1. Since the x-axis is the line y = 0, this means that f(x) = 0 when x = 1.
Using this information, we can write an equation in terms of p and q. If we substitute x = 1 in the given function and get f(1) = 0, it means that:
f(x) = [tex](x - 1)(x^3 + 6x^2 + (6+p)x + (30-q))[/tex]
Therefore, we have:
[tex](x - 1)(x^3 + 6x^2 + (6+p)x + (30-q)) = 0[/tex]
Since (1,0) is a point on the graph of the function, we know that x = 1 is a root of this equation. Therefore, we have:
[tex](x - 1)(x^3 + 6x^2 + (6+p)x + (30-q)) = (x - 1)(x^2 + (7+p)x + (36-p-q))[/tex]
We know that (x - 1) is a factor of this equation, so we can use polynomial long division to divide the expression [tex](x^2 + (7+p)x + (36-p-q))[/tex] by (x - 1). The quotient will give us the other two roots of the equation. However, we do not need to find these roots to answer the question. All we need to know is that p + q = -36.
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the diameter of the cylinder is 6 meters the height of the cylinder is 12 meters what is the volume
Answer:V≈339.29m³
Step-by-step explanation:
V=π(d
2)2h=π·(6
2)2·12≈339.29201m³ Pls if you can answer my question if you have txvs.
Match each phrase with the type of inequality it indicates.
The inequalities represented are:
Below - Less than or equal toAbove - Greater thanMore than - Greater thanSmaller Than - Less thanAt most - Less than or equal toAt least - Greater than or equal toNo more than - Less than or equal toNo less than - Greater than or equal toNot to exceed - Less than or equal toMaximum - Less than or equal toWhat is an inequality?In mathematics, an inequality is a statement that two values or expressions are not equal. It is used to compare two values and determine the relationship between them. Inequalities use symbols such as < (less than), > (greater than), ≤ (less than or equal to), and ≥ (greater than or equal to).
Inequalities can be solved and graphed on a number line to show all possible solutions that satisfy the inequality. They are commonly used in algebra and calculus to express a range of values for a variable.
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