The system of equations to represent the scenario is 1.73x + 3.38y ≤ 28,
and the ordered pair is (8,4).
What is the Linear equation?
A linear equation is an algebraic equation that represents a straight line on a coordinate plane. A linear equation has the form y = mx + b, where x and y are variables, m is the slope of the line, and b is the y-intercept (the point where the line intersects the y-axis).
What is a system of equations?
A system of equations is a set of two or more equations that involve the same variables. In a system of equations, the solution is a set of values for the variables that satisfy all the equations in the system simultaneously. For example, the system of equations:
2x + 3y = 7
x - 2y = 5
has two equations with two variables x and y. The solution to the system is the set of values for x and y that satisfy both equations simultaneously.
According to the given information:
Part 1:
We are given that Apple needs 12 ounces of the stir fry mix, which is made up of rice and dehydrated veggies. Let x be the amount of rice in ounces and y be the amount of dehydrated veggies in ounces.
The total amount of stir fry mix needed is 12 ounces, so we have:
x + y = 12
The cost of the rice is $1.73 per ounce and the cost of the dehydrated veggies is $3.38 per ounce. Apple has $28 to spend and plans to spend it all, so the cost of the stir fry mix must be less than or equal to $28:
1.73x + 3.38y ≤ 28
Part 2:
To solve the system of equations, we can use substitution or elimination. Here, we will use substitution to solve for one variable in terms of the other:
x + y = 12 --> y = 12 - x
Substituting y = 12 - x into the second equation, we get:
1.73x + 3.38(12 - x) ≤ 28
Simplifying and solving for x, we get:
1.73x + 40.56 - 3.38x ≤ 28
-1.65x ≤ -12.56
x ≥ 7.616
We round up to the nearest whole number since we cannot buy a fraction of an ounce of rice. Thus, x = 8 ounces.
Substituting x = 8 into the equation y = 12 - x, we get:
y = 12 - 8
y = 4 ounces
Therefore, Apple buys 8 ounces of rice and 4 ounces of dehydrated veggies. The ordered pair is (8,4).
Part 3:
Our solution (8, 4) means that Apple needs to buy 8 ounces of rice and 4 ounces of dehydrated veggies to make 12 ounces of stir fry mix. The cost of the stir fry mix can be calculated by substituting these values into the cost equation:
1.73(8) + 3.38(4) = $21.48
Since this is less than or equal to the $28 that Apple has to spend, they can afford to buy the necessary ingredients to make the stir fry mix.
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Rule: y is 8 less than 4 times x
Answer:
y = 8 - 4x
" is" is express the equal sighn
"less than" express - sighn so you will write the equestion as
y = 8 - 4x
Kenny decides he wants to buy Christmas presents for his mom and dad. He went to the mall with $150. At the mall, he bought his mom a watch for $68. 99 and arrows for his dad for $38. 99. He then bought himself lunch for $8. 99. Kenny wants to buy his parents one more gift for the both of them to share. Using an inequality, show how much money Kenny could spend on his last gift. What range of costs could he spend on his last gift?
The range of costs that Kenny could spend on his last gift would be any amount less than or equal to $33.03. So the range would be: $0 ≤ x ≤ $33.03
To determine the range of costs Kenny could spend on the last gift, we'll first calculate the total amount he has spent so far and subtract that from the $150 he started with.
Kenny has spent $68.99 (watch) + $38.99 (arrows) + $8.99 (lunch) = $116.97.
Now, let x represent the cost of the last gift. The inequality to represent the situation is:
116.97 + x ≤ 150
To find the range of costs for the last gift, subtract 116.97 from both sides of the inequality:
x ≤ 150 - 116.97
x ≤ 33.03
So, the range of costs Kenny could spend on the last gift is $0 to $33.03.
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Use the given facts about the functions to find the indicated limit.
lim x->3 f(x)=0, lim x->3 g(x)=4 lim x->3 h(x)=2
lim x->3 6h/ 4f+g (x)
*there are no answer choices. Its a prompt*
The value of [tex]\lim_{x \to 3} \frac{6h}{4f+g} (x)[/tex] is 3
Given, [tex]\lim_{x \to 3} f(x)=0[/tex]
[tex]\lim_{x \to 3} g(x)=4[/tex]
[tex]\lim_{x \to 3} h(x)=2[/tex]
We have to find the value of [tex]\lim_{x \to 3} \frac{6h}{4f+g} (x)[/tex]
[tex]\lim_{x \to 3} \frac{6h}{4f+g} (x)=\lim_{x \to 3} \frac{6h(x)}{4f(x)+g(x)}[/tex]
[tex]= \frac{\lim_{x \to 3}6h(x)}{\lim_{x \to 3}4f(x)+\lim_{x \to 3}g(x)}[/tex]
[tex]=\frac{6\times 2}{4\times0+4}[/tex]
= 12/4
= 3
Hence, the value of [tex]\lim_{x \to 3} \frac{6h}{4f+g} (x)[/tex] is 3
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Please Help!!
Use the credit card information below and the designated method of computing interest to fill in the blanks. (See image)
Adjusted Balance Method-
Interest $______
New Balance $______
Using the Adjusted Balance Method:
Interest: $4.15
New Balance: $569.15
How to solveTo calculate the interest and new balance using the Adjusted Balance Method, we need to first find the adjusted balance.
This method takes the previous balance, adds the purchases made before the payment, and then subtracts the payment.
Here's the calculation:
Calculate the adjusted balance:
Previous balance: $500
Purchases before May 20: $25 (May 12)
Subtotal: $525
Payment: $110
Adjusted balance: $525 - $110 = $415
Calculate the interest:
Interest rate: 1% per month
Interest: $415 * 1% = $4.15
Calculate the new balance:
Adjusted balance: $415
Purchases after May 20: $100 (May 22) + $50 (May 30) = $150
Interest: $4.15
New balance: $415 + $150 + $4.15 = $569.15
So, using the Adjusted Balance Method:
Interest: $4.15
New Balance: $569.15
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Joshua is building a model airplane that measures 45 inches. The measurements of the model can vary by as much as 0. 5 inches.
PART 2: Solve the equation to find the minimum and maximum measurements. Round to the nearest tenth if necessary
The minimum and maximum measurements taken by Joshua is 44.5 inches and 45.5 inches, under the condition that Joshua is building a model airplane that measures 45 inches.
Now in order to find the scale factor necessary to find the minimum and maximum measurements of Joshua's model airplane, we have to apply the given information.
The given information include that the difference in measurements of the model vary by 0. 5 inches.
Therefore,
Minimum measurement = 45 - 0.5 = 44.5 inches
Maximum measurement = 45 + 0.5 = 45.5 inches
Hence, the minimum measurement is 44.5 inches and the maximum measurement is 45.5 inches.
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A newspaper for a large city launches a new advertising campaign focusing on the number of digital subscriptions. The equation S(t)=31,500(1. 034)t approximates the number of digital subscriptions S as a function of t months after the launch of the advertising campaign. Determine the statements that interpret the parameters of the function S(t)
The parameters of the function S(t)=31,500(1.034)t are the initial number of digital subscriptions, which is 31,500, and the monthly growth rate, which is 3.4%.
How to find the parameters of the function?
The given function S(t)=31,500(1.034)t is a exponential growth function that models the number of digital subscriptions S as a function of t months after the launch of the advertising campaign. The parameters of the function are the initial number of digital subscriptions, which is 31,500, and the monthly growth rate, which is 3.4%.
The initial value of 31,500 represents the number of digital subscriptions at the start of the advertising campaign. This means that the campaign began with 31,500 digital subscribers.
The monthly growth rate of 3.4% represents the rate at which the number of digital subscriptions is increasing each month due to the advertising campaign. This means that for each month after the launch of the campaign, the number of digital subscribers is increasing by 3.4% of the previous month's total.
For example, after one month, the number of digital subscribers would be:
S(1) = 31,500(1.034)1 = 32,687
After two months, the number of digital subscribers would be:
S(2) = 31,500(1.034)2 = 33,912
And so on...
Therefore, the initial value and monthly growth rate are important parameters that help us understand how the number of digital subscriptions is changing over time due to the advertising campaign.
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You can only make four different cuboids with 12 cubes complete the table to show the dimensions
Each cuboid has a total of 12 cubes, but they have different shapes and sizes. The table is attached below.
What is the cube?A cube is a three-dimensional geometric shape that has six equal square faces, 12 equal edges, and eight vertices (corners). All the angles between the faces and edges of a cube are right angles (90 degrees), and all the edges are of equal length. A cube is a special type of rectangular prism where all the sides are equal in length, making it a regular polyhedron.
Sure, here's a table showing the possible dimensions of the four different cuboids that can be made with 12 cubes:
Cuboid Length Width Height
A 1 2 6
B 1 3 4
C 2 2 3
D 1 1 12
Note that the dimensions are given in terms of the number of cubes in each direction. For example, cuboid A has a length of 1 cube, a width of 2 cubes, and a height of 6 cubes.
Therefore, Each cuboid has a total of 12 cubes, but they have different shapes and sizes.
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Find < F:
(Round your answer to the nearest hundredth)
The length of the hypotenuse is approximately 7.21 ft.
To solve this problem, we can use the Pythagorean theorem, which states that in a right triangle, the sum of the squares of the two shorter sides (legs) is equal to the square of the longest side (hypotenuse). In mathematical terms, it looks like this:
a² + b² = c²
Where "a" and "b" are the lengths of the legs, and "c" is the length of the hypotenuse.
In your case, we can substitute the given values into the equation:
6² + 4² = c²
Simplifying:
36 + 16 = c²
52 = c²
To solve for "c," we need to take the square root of both sides of the equation:
√(52) = c
We can simplify the square root of 52 to be 2 times the square root of 13. Therefore:
c ≈ 7.21 ft
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Complete Question:
Find the value of hypotenuse of the given triangle by using the Pythagoras theorem.
Emilio saves 25% of the money he earns babysitting. he earns an average of $30 each week. which expression represents the change in emilio’s savings each week?
The expression that represents the change in Emilio's savings each week is $7.50.
How to find the Emilio savings?
Emilio saving 25% of the money he earns babysitting, which means that he saves a quarter of his earnings. This can be expressed mathematically as:
savings = 0.25 x earnings
where "savings" is the amount Emilio saves and "earnings" is the amount he earns each week.
Substituting the given value of Emilio's average weekly earnings of $30, we get:
savings = 0.25 x $30
savings = $7.50
Therefore, Emilio saves $7.50 each week.
Since the question asks for the change in Emilio's savings each week, the expression that represents this is simply:
$7.50
This means that Emilio's savings increase by $7.50 each week.
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Match each angle description on the left with its possible angle measure, m, on the right.
Acute angle ⇒ 0⁰ < m < 90⁰
Straight angle ⇒ m = 180⁰
Obtuse angle ⇒ 90⁰ < m < 180⁰
Right angle ⇒ m = 90⁰
What is an obtuse angle?An obtuse angle is an angle that measures greater than 90 degrees but less than 180 degrees. In other words, an obtuse angle is an angle that is wider than a right angle (90 degrees), but not as wide as a straight angle (180 degrees).
When two rays or line segments intersect at a point, they form an angle. If the angle formed is less than 90 degrees, it is called an acute angle. If the angle is exactly 90 degrees, it is called a right angle.
If the angle is greater than 90 degrees but less than 180 degrees, it is called an obtuse angle. Finally, if the angle measures exactly 180 degrees, it is called a straight angle.
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Find the area under the standard normal distribution curve between z=0 and z=0. 98
The area under the standard normal distribution curve between z = 0 and z = 0.98 is:
0.8365 - 0.5000 = 0.3365
To find the area under the standard normal distribution curve between z = 0 and z = 0.98, we can use a standard normal distribution table or a calculator that can compute normal probabilities.
Using a standard normal distribution table, we can look up the area corresponding to a z-score of 0 and a z-score of 0.98 separately and then subtract the two areas to find the area between them.
The area under the standard normal distribution curve to the left of z = 0 is 0.5000 (by definition). The area under the curve to the left of z = 0.98 is 0.8365 (from the standard normal distribution table).
So the area under the standard normal distribution curve between z=0 and z=0.98 is approximately 0.3365.
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Write your answers in percent form, rounded to the nearest tenth of a percent. Determine the probability of 3 rainy days in a row when the probability of rain on each single day is 56% Answer: % Determine the probability of 3 sunny days in a row when the probability of rain on each single day is 56% Answer: %
The probability of 3 rainy days in a row when the probability of rain on each single day is 56% ≈ 17.6%
The probability of 3 sunny days in a row when the probability of rain on each single day is 56% ≈ 8.5%
To determine the probability of 3 rainy days in a row, you need to multiply the probability of rain on each single day (56%). In percent form, this would be:
56% × 56% × 56% = 0.56 × 0.56 × 0.56 ≈ 0.175616
To express this as a percentage rounded to the nearest tenth, we have:
0.175616 × 100% ≈ 17.6%
Now, to determine the probability of 3 sunny days in a row, you first need to find the probability of a sunny day, which is the complement of the probability of rain:
100% - 56% = 44%
Next, multiply the probability of a sunny day (44%) for three days:
44% × 44% × 44% = 0.44 × 0.44 × 0.44 ≈ 0.085184
To express this as a percentage rounded to the nearest tenth, we have:
0.085184 × 100% ≈ 8.5%
So, the probability of 3 rainy days in a row is approximately 17.6%, and the probability of 3 sunny days in a row is approximately 8.5%.
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How much will the monthly payment be for a new car priced at $29,950 if the current finance rate is 36 months at 3. 16%? Include financing the 8% TT&L and make a 25% down payment.
I need the answer fast!!
The monthly payment for a new car priced at $29,950 with financing the 8% TT&L and making a 25% down payment at a current finance rate of 3.16% for 36 months is approximately $698.62.
How to find calculate the monthly payment?
To calculate the monthly payment for a new car priced at $29,950 with the current finance rate of 3.16% for 36 months, we need to consider several factors, including the down payment and taxes.
First, we need to calculate the total cost of the car, including the taxes, title, and license (TT&L) fees. We can do this by adding 8% of the car's price ($29,950) to the price of the car, which comes to $32,346 ($29,950 + 8% of $29,950).
Next, we need to calculate the amount of the down payment. A 25% down payment on $32,346 comes to $8,086.50 ($32,346 x 0.25).
Subtracting the down payment from the total cost of the car gives us the amount we need to finance, which is $24,259.50 ($32,346 - $8,086.50).
Now, we can use a loan calculator to determine the monthly payment. Based on these figures, the monthly payment would be approximately $698.62 per month for 36 months.
In summary, to calculate the monthly payment for a new car priced at $29,950 with the current finance rate of 3.16% for 36 months, we need to consider the total cost of the car, including taxes and fees, the down payment, and the amount to be financed. The monthly payment is then calculated using a loan calculator, which gives us a monthly payment of $698.62 for 36 months.
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Use implicit differentiation to find the derivative of sin(y²)+x=eʸ
To find the derivative of sin(y²)+x=eʸ using implicit differentiation, we need to differentiate both sides of the equation with respect to x.
Starting with the left side, we use the chain rule and the derivative of sin(u), which is cos(u) times the derivative of u with respect to x:
d/dx(sin(y²)) = cos(y²) * d/dx(y²)
Using the power rule, we get:
d/dx(y²) = 2y * d/dx(y)
Putting it all together:
d/dx(sin(y²)) = 2y * cos(y²) * d/dx(y)
Now let's move on to the right side of the equation. The derivative of implicit function eʸ with respect to x is simply eʸ times the derivative of y with respect to x:
d/dx(eʸ) = eʸ * d/dx(y)
Putting it all together, we have:
2y * cos(y²) * d/dx(y) + 1 = eʸ * d/dx(y)
We can now solve for d/dx(y):
d/dx(y) = (1 - 2y * cos(y²)) / eʸ
Therefore, the derivative of sin(y²)+x=eʸ is:
d/dx(y) = (1 - 2y * cos(y²)) / eʸ.
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In the diagram below, DE is parallel to AB. If CE = 2,
AC = 3.6, AB = 4.2, and DC = 2.4, find the length of CB.
Figures are not necessarily drawn to scale.
The length of CB is 3 unit.
In the given figure ;
By SAS property of similar of triangles,
ΔCED and ΔCAB are similar.
Therefore,
CE/CB = DE/AB = DC/AC
⇒ CE/CB = DC/AC
⇒ 2/CB = 2.4/3.6
⇒ CB = (3.6/2.4)X2 = 3
Hence CB = 3
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At Sugar Creek Middle School, there are two sizes of lockers for the students: one size for the sixth-grade and seventh-grade students and a larger size for the eighth-grade students. Both sizes of lockers are 5 feet tall and 1 foot wide. The lockers for the younger students each have a volume of 5 cubic feet, while the lockers for the eighth-grade students each have a volume of 7.5 cubic feet.
How much deeper are the lockers for the eighth-grade students than the lockers for the younger students?
Um need help this is so hard
Answer:Blue one.71.82
Step-by-step explanation:
6.3*11.4=71.82
Answer:
71.82 I think
Step-by-step explanation:
To gather information about the elk population, biologist marked 75 elk. later, they flew over the region and counted 250 elk, of
which 15 were marked. what is the best estimate for the elk population?
es -))
a)
1,200
b)
1,250
c)
1,300
d)
1,350
The best estimate for the elk population is b) 1,250.
To estimate the elk population, you can use the mark and recapture method. The proportion of marked elk to the total marked population should be equal to the proportion of marked elk observed in the sample to the total observed population.
So, (marked elk / total marked population) = (marked elk observed / total observed population)
In this case: (75 / total population) = (15 / 250)
Now, solve for the total population:
75 / total population = 15 / 250
Cross-multiply:
15 * total population = 75 * 250
total population = (75 * 250) / 15
total population = 18,750 / 15
total population = 1,250
The best estimate for the elk population is 1,250 (option b).
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how many different triangles can be formed by side lengths 2 cm, 7cm, and 70 degrees angle formed by these given sides?
Probability & Sampling:Question 1
Stephanie recorded the time, in minutes, she took to walk
from home to work.
{15, 16, 18, 20, 21)
She also recorded the time, in minutes, she took to walk
from work to home.
(14, 21, 21, 25, 27)
Based on the data she collected, what is the best
conclusion Stephanie can make?
"Based on the data Stephanie collected, the best conclusion she can make is that her commute time varies between walking from home to work and walking from work to home."
Stephanie recorded the time it took for her to walk from home to work and from work to home. The recorded times for walking from home to work are 15, 16, 18, 20, and 21 minutes. The recorded times for walking from work to home are 14, 21, 21, 25, and 27 minutes.
From the given data, we can see that Stephanie's commute time is not consistent. The time it takes for her to walk from home to work varies between 15 and 21 minutes, and the time it takes for her to walk from work to home varies between 14 and 27 minutes. There is no clear pattern or trend in the data.
Therefore, the best conclusion Stephanie can make is that her commute time fluctuates, and it is not fixed or predictable. The specific duration of her commute can vary from day to day.
In conclusion, Stephanie's commute time varies between walking from home to work and walking from work to home, as indicated by the range of recorded times for each direction.
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What is the radius if you are given the diameter of 36 m?
Answer:
Radius = 18 m
Step-by-step explanation:
Given:
Diameter = 36 m
To find:
Radius
Explanation:
We know that,
Radius = Diameter/2 = 36/2 = 18 m
Final Answer:
18 m
Frank just bought a refrigerator for 1036. He paid 103.60 in a down payment and will pay the rest in 4 equal installments. How much does he need to pay for each installment?
Frank needs to pay $233.10 for each installment.
How much per installment for refrigerator?To determine how much Frank still owes on the refrigerator after paying the down payment. We can subtract the down payment from the total cost of the refrigerator:
Total cost of refrigerator = $1036
Down payment = $103.60
Amount owed = Total cost of refrigerator - Down payment
Amount owed = $1036 - $103.60
Amount owed = $932.40
Next, we need to determine how much Frank will pay for each installment. Since he will pay the remaining balance in 4 equal installments, we can divide the amount owed by 4:
Amount owed = $932.40
Number of installments = 4
Amount per installment = Amount owed / Number of installments
Amount per installment = $932.40 / 4
Amount per installment = $233.10
Therefore, Frank needs to pay $233.10 for each installment to fully pay off the refrigerator. By breaking down the cost into smaller payments, Frank can manage his budget more effectively and avoid the burden of making a large payment all at once.
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A boat heading out to sea starts out at point aa, at a horizontal distance of 1433 feet from a lighthouse/the shore. from that point, the boat’s crew measures the angle of elevation to the lighthouse’s beacon-light from that point to be 15∘. at some later time, the crew measures the angle of elevation from point bb to be 6∘. find the distance from point aa to point bb. round your answer to the nearest tenth of a foot if necessary.
The distance from point A to point B is approximately 13706.2 feet. Rounded to the nearest tenth of a foot, this is 164474.4 inches or 13706.2 / 12 ≈ 1142.2 feet.
Let's first draw a diagram to visualize the situation:
Lighthouse
|
| x
|
|
A ------------ B
y
In the diagram, A is the starting point of the boat, B is the point where the crew measures the angle of elevation to be 6 degrees, and Lighthouse is the location of the lighthouse. We are looking for the distance AB.
From point A, we can use the tangent of the angle of elevation to find the height of the lighthouse beacon above sea level:
tan(15°) = height / 1433 feet
height = 1433 feet * tan(15°) ≈ 383.6 feet
Similarly, from point B, we can find the height of the lighthouse beacon above sea level:
tan(6°) = height / (1433 feet + AB)
height = (1433 feet + AB) * tan(6°)
Now we can set these two expressions for height equal to each other, since they represent the same height:
1433 feet * tan(15°) = (1433 feet + AB) * tan(6°)
Multiplying both sides by the denominator of the right-hand side, we get:
1433 feet * tan(15°) = 1433 feet * tan(6°) + AB * tan(6°)
Subtracting 1433 feet * tan(6°) from both sides, we get:
AB * tan(6°) = 1433 feet * (tan(15°) - tan(6°))
Dividing both sides by tan(6°), we get:
AB = 1433 feet * (tan(15°) - tan(6°)) / tan(6°) ≈ 13706.2 feet
Therefore, the distance from point A to point B when rounded to the nearest tenth of a foot, this is 164474.4 inches or 13706.2 / 12 ≈ 1142.2 feet.
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the line is parallel to the graph of 2x-3y=7 and contains the point (-3, -3)
The equation of the line that is parallel to the graph of 2x-3y=7 and contains the point (-3, -3) is expressed as: y = (2/3)x - 1.
What is the Equation of Parallel Lines?To find the equation of a line that is parallel to the graph of 2x - 3y = 7, we need to determine the slope of the given line. We can rewrite the equation in slope-intercept form:
2x - 3y = 7
-3y = -2x + 7
y = (2/3)x - 7/3
This implies that the slope of this line is m = 2/3.
Thus, the equation of the line we are to find will take the following form:
y = (2/3)x + b
where b is the y-intercept of the line.
To find the y-intercept (b), substitute (x, y) = (-3, -3) and m = 2/3 into y = mx + b:
-3 = (2/3)(-3) + b
-3 = -2 + b
b = -1
Substitute m = 2/3 and b = -1 into y = mx + b:
y = (2/3)x - 1
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Your gross pay is $2,500 and your net pay is $1,750. How much was withheld from your pay?
a: $250
b: $500
c:750
d:4,250
$750 was withheld from my pay after deductions form the gross pay
How to calculate the amount of money that was withheld from my pay?
Gross pay is the money that an employee gets before tax and other deduction are made
Net pay is the amount of money given to am employee after deduction of tax and other mandatory expenses
The gross pay is $2,500
The net pay is $1,750
The money withheld can be calculated as follows
= 2500 - 1750
= 750
The money withheld from the gross pay is $750
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The Smith family goes to Happy Burger and orders 6 hamburgers and 3 fries for a total of $19. 50. The Jansen family also goes to Happy Burger and orders 8 hamburgers and 6 fries for a total of $29. 0. Write the system of equations that represents this situation and determine the cost of one hamburger and one order of fries.
The cost of one hamburger is $2.50 and the cost of one order of fries is $1.50.
Let's use h to represent the cost of one hamburger and f to represent the cost of one order of fries.
The Smith family's order can be represented by the equation:
6h + 3f = 19.50
The Jansen family's order can be represented by the equation:
8h + 6f = 29.00
We now have a system of two linear equations with two variables:
6h + 3f = 19.50
8h + 6f = 29.00
To solve for h and f, we can use the elimination method. We can start by multiplying the first equation by 2 to eliminate the variable f:
12h + 6f = 39.00
8h + 6f = 29.00
Subtracting the second equation from the first, we get:
4h = 10.00
Solving for h, we get:
h = 2.50
Now that we know the cost of one hamburger, we can substitute this value back into one of the original equations to solve for f. Using the first equation:
6h + 3f = 19.50
6(2.50) + 3f = 19.50
15 + 3f = 19.50
3f = 4.50
f = 1.50
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Find the critical points and the interval on which the given function is increasing or decreasing, and apply the First Derivative Test to each critical point. f(x) = ** + 5x 10x-60 (Use decimal notation)
The critical points of the given function f(x) = ** + 5x/ (10x-60) are x = 6 and x = -6/5. The function is decreasing on (-∞, -6/5) and increasing on (-6/5, 6) and (6, ∞). The First Derivative Test shows that x = -6/5 is a local maximum and x = 6 is a local minimum.
To find the critical points, we need to first find the derivative of the function. Using the quotient rule, we get:
f'(x) = (10x - 60)(**)' - **(10x - 60)' / (10x - 60)²
Simplifying, we get:
f'(x) = 50 / (10x - 60)²
The critical points occur where the derivative is zero or undefined. Here, the derivative is never undefined, so we only need to find where it is zero:
50 / (10x - 60)² = 0
This occurs when x = 6 and x = -6/5.
Next, we need to determine the intervals on which the function is increasing or decreasing. To do this, we can use the first derivative test. We test a value in each interval of interest to see if the derivative is positive or negative:
For x < -6/5, we choose x = -2:
f'(-2) = 50 / (10(-2) - 60)² = -5/81 < 0
Therefore, the function is decreasing on (-∞, -6/5).
For -6/5 < x < 6, we choose x = 0:
f'(0) = 50 / (10(0) - 60)² = 5/9 > 0
Therefore, the function is increasing on (-6/5, 6).
For x > 6, we choose x = 10:
f'(10) = 50 / (10(10) - 60)² = 5/81 > 0
Therefore, the function is increasing on (6, ∞).
Finally, we can use the First Derivative Test to determine the nature of the critical points.
For x = -6/5:
f'(-6/5 - ε) < 0 and f'(-6/5 + ε) > 0, for small values of ε.
Therefore, x = -6/5 is a local maximum.
For x = 6:
f'(6 - ε) < 0 and f'(6 + ε) > 0, for small values of ε.
Therefore, x = 6 is a local minimum.
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It takes a ship three hours to sail 72km with the current and 4 hours against it. Find the speed of the ship in still water and find the speed of the current
Answer:
The speed of the ship =21 km/h
Speed of the current = 3 km/h
Step-by-step explanation:
Let's denote the speed of the ship in still water as s and the speed of the current as c.
When the ship is traveling with the current, the effective speed is (s + c). (we have to sum up both the speeds) Therefore, in 3 hours, the ship can travel a distance of:
distance = speed × time = (s + c) × 3
We know that this distance is 72 km, so we can write:
(s + c) × 3 = 72
Simplifying this equation, we get:
s + c = 24
Similarly, when the ship is traveling against the current, the effective speed is (s - c). (The difference between the speeds). Therefore, in 4 hours, the ship can travel a distance of:
distance = speed × time = (s - c) × 4
We know that this distance is also 72 km, so we can write:
(s - c) × 4 = 72
Simplifying this equation, we get:
s - c = 18
We now have two equations:
s + c = 24 ; s - c = 18
We can solve for s and c by adding these two equations:
2s = 42
Therefore, s = 21 km/h.
Substituting this value of s into one of the equations above, we can solve for c:
s + c = 24
21 + c = 24
c = 3 km/h.
Therefore, the speed of the ship in still water is 21 km/h, and the speed of the current is 3 km/hs
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A school wants to rent out a laser tag arena the table shows the cost of renting the arena for different numbers of hours suppose the arena charges a constant hourly rate fill in the missing value in the table
hours _______ 5 9 -___________
cost (in dollars ) 500 1,250 __________ 3,500
The constant hourly rate using the given data points is $100 per hour.
To calculate the constant hourly rate, we can use the given data points. For example, let's use the 5-hour rental for $500:
Hourly rate = Total cost / Number of hours
Hourly rate = $500 / 5 hours
Hourly rate = $100 per hour
Now, we can use this hourly rate to find the cost for the missing hour value in the table:
Cost = Hourly rate × Number of hours
Cost = $100 per hour × 9 hours
Cost = $900
So, the table will look like this:
Hours: _______ 5 | 9 | _______
Cost (in dollars): 500 | 1,250 | 3,500
Now we can calculate the missing hours for the $3,500 cost:
Number of hours = Total cost / Hourly rate
Number of hours = $3,500 / $100 per hour
Number of hours = 35 hours
Now, the completed table is:
Hours: _______ 5 | 9 | 35
Cost (in dollars): 500 | 1,250 | 3,500
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Cleo bought a computer for
$
1
,
495
. What is it worth after depreciating for
3
years at a rate of
16
%
per year?
After depreciating for 3 years at a rate of 16% per year, the computer is worth approximately $788.26.
To find the worth of the computer after depreciating for 3 years at a rate of 16% per year, we can use the formula for compound interest with depreciation.
Given:
Initial value (cost of the computer) = $1,495
Depreciation rate = 16% per year
Number of years = 3
1. Convert the depreciation rate to a decimal: 16% = 0.16.
2. Calculate the depreciation factor, which is (1 - depreciation rate):
Depreciation factor = 1 - 0.16 = 0.84.
3. Apply the formula for compound interest with depreciation:
Worth = Initial value * (Depreciation factor)^(Number of years).
Substituting the given values into the formula:
Worth = $1,495 * (0.84)^3.
Calculating the exponent:
Worth = $1,495 * 0.84 * 0.84 * 0.84.
Simplifying the expression:
Worth ≈ $788.26.
Therefore, after depreciating for 3 years at a rate of 16% per year, the computer is worth approximately $788.26.
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