Answers
Related Questions
2010 2008
$971 $812
$977 $943
$900 $873
$1071 $1023
$501 $486
3. Identify whether the mean or median is a more accurate reflection of the data.
Explain why.
Answers
The median is the accurate reflection of the data
How to solve for the mean501, 900, 971, 977, 1071
The mean would be
summation of the values
mean = 884
The median is the value that occurs in the middle = 971
The median would be more accurate reflection of the data. 501 is an outler. This is what caused us to have a mean that is c loser to 884. Hence we have 971 the median to be more accurate reflection of the data
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Tyler is simplifying the expression: 6-2x+5+4x Here is his work
6-2x+5+4x
(6-2)x+(5+4)x
4x+x
13x
a. Explain the error he made
b. Simplify the expression: 6-2x+5+4x
Answers
Answer:
11-2x not 13x
Step-by-step explanation:
\(6-2)x + (5-4)x does = 13x
If there were parentheses as in the 2nd line, everything else is correct
the mistake is going from
6-2x + 5-4x to
(6-2x) + (5-4)x
PEMDAS is the order of operations. P for parentheses 1st, Multiplication 3rd, addition 4th, subtraction 5th
(there are no exponents or division or parentheses, so it's just M, A and S that apply)
combine like terms, 2x-4x =-2x
combine the constant terms 6+5 = 11
6-2x +5-4x = 11-2x
The mistake was assuming parentheses when they aren't there.
correct answer is 11-2x not 13x
How to provide appropriate commentaries Thet will assist learners in the completing the sum of 8+(6-3)-9
Answers
Answer:
Step-by-step explanation:
8+(6-3)-9
The first action is addition in parentheses
(6-3) = 3
The second action is addition and then subtraction, you can subtract first and then add, it makes no difference because the answer will be the same in all cases
8 + 3 - 9 = 11 - 9 = 2
What rate of interest, to the nearest tenth of a percent, compounded quarterly is needed for an investment of $1600 to grow to $2400 in 11 years
Answers
Compound interest is the interest earned on the principal and the interest previously accumulated. It is given by
[tex]A=P(1+r/n)^{nt}[/tex]
where P = Principal, r = annual rate of interest, n = the number of times interest is compounded per year & t = time in years.
The given principal is $1600 for 11 years & amount is $2400 compounded quarterly.
To find the rate of interest compounded quarterly for 11 years substitute the given values in the above formula i.e
[tex]2400=1600(1+r/4)^{11*4}[/tex]
r=3.70%.
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A manufacturer earned $55 per hour of labor when it opened. Each year the
manufacturer earns an additional 7% per hour. Write a function that gives the
amount A(t) that the plant earns per hour t years after it opens.
Write a exponential function
Answers
The exponential function that gives the amount A(t) that the plant earns per hour t years after it opens is [tex]A(t) = 55(1.07)^t[/tex]
A manufacturer earned $55 per hour of labor when it opened.
Each year the manufacturer earns an additional 7% per hour.
Since the manufacturer earns an additional 7% per hour each year, the amount earned per hour can be represented as follows:
[tex]A(t) = 55(1 + 0.07)^t[/tex]
where t is the number of years after the plant opened. T
This can be simplified as function:
[tex]A(t) = 55(1.07)^t[/tex]
Therefore, the exponential function that gives the amount A(t) that the plant earns per hour t years after it opens is [tex]A(t) = 55(1.07)^t[/tex]
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4. Which set of data could be represented by the box-and-whisker plot? (1 point)
O0, 3, 9, 9, 11, 14, 15, 16, 16, 18, 19, 25, 25, 28, 28, 30
O2, 3, 4, 7, 13, 15, 15, 15, 16, 17, 20, 22, 25, 25, 26, 28
O2, 6, 7, 8, 10, 11, 12, 14, 18, 20, 22, 24, 26, 27, 27, 28
O2, 2, 7, 10, 10, 11, 13, 15, 17, 20, 20, 24, 26, 27, 27, 28
Answers
A set of data that could be represented by the box-and-whisker plot include the following: D.
The median of the set of data is equal to 10.
What is a box-and-whisker plot?In Mathematics and Statistics, a box-and-whisker plot is a type of chart that can be used to graphically or visually represent the five-number summary of a data set with respect to locality, skewness, and spread.
Based on the information provided about the data set (2, 2, 7, 10, 10, 11, 13, 15, 17, 20, 20, 24, 26, 27, 27, 28), the five-number summary for the given data set include the following:
Minimum (Min) = 2.
First quartile (Q₁) = 16.
Median (Med) = 10.
Third quartile (Q₃) = 25.5.
Maximum (Max) = 28.
In conclusion, we can logically deduce that the median of the data set is 10 and it has no outlier.
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The mean pulse rate in beats per minute of a certain group of adult males is 76 bpm. The hypothesis test results in a p-value of 0.0075
State a conclusion about the null hypothesis
Answers
The conclusion on the null hypothesis is B. Reject H₀ because the P-value is less than or equal to a.
How to conclude on the null hypothesis ?It is posited that the mean pulse rate for a specific grouping of adult males equals 76 bpm as set forth by the null hypothesis. In its place, an alternative hypothesis suggests this figure does not reflect actuality.
At a given significance level identified by alpha = 0.05, rejection of the null hypothesis requires us to identify a P-value lesser than or equal to 0.05.
The P-value determined within the question happens to be below such a threshold at 0.0075, which results in the rejecting of the null hypothesis.
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Hello please I don't understand this exercise..
In an orthonormal frame (o; i; j), we give the points A(3; 1), B(1; 2) and the line (AC) with equation 2x-y-5=0.
1) Determine the equation of the line (AB).
2)a) Show that the direction vectors AB and AB of the lines (AC) and (AB) are orthogonal.
b) Then determine the coordinates of C.
Answers
The equation of the line AB,with slope of -1/2 is y = (-1/2)x + 7/2. We then use the dot product to show that the direction vectors of the lines AB and AC are orthogonal, and the coordinates of point C is (6,7).
In an orthonormal frame (o; i; j), the points A and B are given as A(3;1) and B(1;2), and the line (AC) is given by the equation 2x-y-5=0.
To determine the equation of line (AB), we need to find the slope (or gradient) of the line passing through A and B. We can find this by using the formula
slope = (y2 - y1) / (x2 - x1)
where (x1, y1) and (x2, y2) are the coordinates of two points on the line. Substituting the values of A and B, we get
slope = (2 - 1) / (1 - 3) = -1/2
Now that we have the slope, we can use the point-slope form of a line to find the equation of line (AB). Let (x,y) be any point on the line, then we have
y - 1 = (-1/2)(x - 3)
Simplifying, we get
y = (-1/2)x + 7/2
So the equation of line (AB) is y = (-1/2)x + 7/2.
To show that the direction vectors AB and AC of the lines (AB) and (AC) are orthogonal, we need to find the direction vectors of these lines and show that their dot product is zero. The direction vector of a line is just the vector that "points" in the direction of the line. To find it, we can take any two points on the line and subtract their coordinates to get a vector.
For line (AC), we can take A and C as two points on the line. Since we don't know the coordinates of C yet, we can solve the equation of line (AC) for x to get
x = (y + 5) / 2
Now substituting x by the above expression in the coordinates of point A we get
C((y + 5)/2, y)
Thus, the direction vector of line (AC) is
AC = C - A = ((y + 5)/2 - 3, y - 1) = (y/2 - 7/2, y - 1)
Similarly, we can take A and B as two points on the line (AB) to get the direction vector of line (AB):
AB = B - A = (1-3, 2-1) = (-2, 1)
Now, the dot product of AB and AC is
AB · AC = (-2)(y/2 - 7/2) + (1)(y - 1) = -y + 7
We can see that the dot product is zero when y=7. Hence, direction vectors AB and AC are orthogonal at point C(3,7).
To determine the coordinates of C, we substitute y=7 in the equation of line (AC) we obtained earlier
2x - y - 5 = 0
2x - 7 - 5 = 0
2x = 12
x = 6
Therefore, C has coordinates (6,7).
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for each pair of lines determine whether they are parallel, perpendicular, or neither
Answers
Answer:
All lines are parallel.
Step-by-step explanation:
Get each equation in Slope-Intercept form:
1. Divide both sides by 3: [tex]y=-\frac{4}{3}x+\frac{7}{3}[/tex]
2. No change
3. Subtract 8x and divide by 6 on both sides: [tex]y=-\frac{4}{3}x-\frac{2}{3}[/tex]
Notice:
a. All slopes are -4/3
b. All y-intercepts are different
Complete the following using compound future value. (Use the Table provided.)
Note: Do not round intermediate calculations. Round your final answers to the nearest cent.
Time
6 years
Principal
$ 15,300
Rate
8 %
Compounded
Quarterly
What is amount &
Interest?
Answers
Answer:
We can use the formula for compound interest to calculate the amount and interest:
A = P * (1 + r/n)^(n*t)
I = A - P
Where:
P = Principal = $15,300
r = Rate = 8% = 0.08
n = Compounding frequency per year = 4 (since it is compounded quarterly)
t = Time period = 6 years
Plugging in the values, we get:
A = 15,300 * (1 + 0.08/4)^(4*6) = $23,659.28
I = 23,659.28 - 15,300 = $8,359.28
Therefore, the amount after 6 years is $23,659.28 and the interest earned is $8,359.28.
I hope this helps.
Lines and Angles
10) In the figure below BD is the perpendicular bisector of AC. Find the value of x.
3(2x-8)
4425
Enter your answer in the box.
x=
Answers
Since BD is the perpendicular bisector of AC, then AB = BC, which implies 2x - 8 = 5x - 17.
Solving for x, we have:
3(2x - 8) = 4425
6x - 24 = 4425
6x = 4451
x = 741.83
Rounding to the nearest whole number, we have x = 742.
Therefore, x = 742.
Which is equivalent to 234 2/5
Answers
234 2/5 is equivalent to 1172/5.
234 2/5 is a mixed number, which means it is a combination of a whole number and a fraction.
To convert it to an improper fraction, we need to multiply the whole number by the denominator of the fraction and add the numerator.
The result becomes the new numerator, and the denominator stays the same.
In this case, we have:
234 2/5 = (234 x 5 + 2) / 5
= 1172/5
Therefore, 234 2/5 is equivalent to 1172/5 as an improper fraction.
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If f(5)=-1 , write a corresponding ordered pair solution
Answers
Answer: (5, -1)
Step-by-step explanation:
format: f(x)
in f(5)=-1 x=5
also sometimes f(x) is called y so y= -1
put into ordered pair format
(5, -1)
what are the answers to these questions?
Answers
If the line passes through the point (2,8) that cuts off the least area from the first quadrant, the slope is 8/3 and the y-intercept is 0.
To find the equation of the line that passes through the point (2, 8) and cuts off the least area from the first quadrant, we need to first determine the slope of the line. The slope-intercept form of a line is y = mx + b, where m is the slope and b is the y-intercept.
We can use the point-slope form of the equation of a line to find the slope. The point-slope form is y - y₁ = m(x - x₁), where (x₁, y₁) is a point on the line. Plugging in (2, 8) as the point, we get:
y - 8 = m(x - 2)
Next, we want to minimize the area that the line cuts off in the first quadrant. Since the line passes through the origin (0, 0), the area cut off by the line in the first quadrant is equal to the product of the x- and y-intercepts of the line.
We can express the x-intercept in terms of y by setting y = 0 in the equation of the line and solving for x:
0 - 8 = m(x - 2)
x = 2 + 8/m
The y-intercept is simply the y-coordinate of the point where the line intersects the y-axis, which is given by:
y = mx + b
8 = 2m + b
b = 8 - 2m
We can now express the area cut off by the line as:
A = x*y
A = (2 + 8/m)*8 - (8 - 2m)*2/m
A = (16 + 64/m) - (16 - 4m)/m
A = 64/m + 4m/m
To minimize the area, we can take the derivative of A with respect to m and set it equal to zero:
dA/dm = -64/m² + 4/m² = 0
64 = 4
m = 8
Plugging m = 8 into the equation for the x-intercept, we get:
x = 2 + 8/8 = 3
So the equation of the line is y = 8x/3.
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You want to determine the number of students in your school who have visited a public library. You survey 30 students at random. Twenty-four have visited a public library, and six have not. So, you conclude that 80% of the students in your school have visited a public library.
Determine whether the conclusion is valid
Answers
Answer: e
Step-by-step explanation:
Answer:Valid
Step-by-step explanation:
I really need hep please
Answers
The valid row-operation which needs to be performed on the given matrix to get "1" in position of row1 and column1 are "R₁ → 2R₁ + R₂" and then "R₁ → R₁/2".
The "row-operation" is a type of matrix operation that involves swapping, scaling, or adding rows in a matrix. These operations are used to transform a matrix into a more reduced form.
The Augmented matrix on which we have to perform the "row-operation" is
⇒ [tex]\left[\begin{array}{ccc}7&-4&8\\-12&7&-13\end{array}\right][/tex],
To get "1" in first row and first column,
The first row-operation is R₁ → 2R₁ + R₂
We get,
⇒ [tex]\left[\begin{array}{ccc}7\times 2-12&-4\times 2+7&8\times 2-13\\-12&7&-13\end{array}\right][/tex],
⇒ [tex]\left[\begin{array}{ccc}14-12&-8+7&16-13\\-12&7&-13\end{array}\right][/tex]
⇒ [tex]\left[\begin{array}{ccc}2&-1&3\\-12&7&-13\end{array}\right][/tex],
The second , row-operation to get a "1", is R₁ → R₁/2,
We get,
⇒ [tex]\left[\begin{array}{ccc}2/2&-1/2&3/2\\-12&7&-13\end{array}\right][/tex],
⇒ [tex]\left[\begin{array}{ccc}1&-0.5&1.5\\-12&7&-13\end{array}\right][/tex].
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Make x the subject of the formula where x is positive:
2(x-2y) = 6xz+5u
Answers
Answer:
x = [tex]\frac{5u+4y}{2-6z}[/tex]
Step-by-step explanation:
2(x - 2y) = 6xz + 5u ← distribute parenthesis on left side
2x - 4y = 6xz + 5u ( add 4y to both sides )
2x = 6xz + 5u + 4y ( subtract 6xz from both sides )
2x - 6xz = 5u + 4y ← factor out x from each term on the left side
x(2 - 6z) = 5u + 4y ← divide both sides by (2 - 6z)
x = [tex]\frac{5u+4y}{2-6z}[/tex]
use synthetic division
PLEASE HELP 30 PTS
Answers
Answer:
The quotient is
[tex]8 {x}^{2} + 15x - \frac{1}{8} [/tex]
and the remainder is
[tex] \frac{63}{64} [/tex]
A map shows the vertices of a campsite are (25,10), (25,-5), (-5,-5), and (-5,10). The vertices of your tent are (0,-3), (0,6), (10,6), and (10,-3). The coordinates are measured in feet. What percent of the campsite is not covered by your tent?
Answers
The percent of the area that is not covered is 80 percent
How to calculate the area that is not coveredIn mathematics area is defined as the absolute or total space that an object or shape occupies. It is usually measured using centimeters, cm ² square or the use of meter square m ².
area of tent
= (10 - 0) * (6 - (-3))
= 90
The area of the campsite would be:
(25 - (-5) x (10 - (-5))
= 450
Then the area would be 450 - 90
= 360
the percentage that is not covered by tent = 360 / 450 x 100
= 80 percent
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Two similar cones have surface areas of 1883 square meters and 7532 square meters, respectively. If the height of the smaller cone is 36 meters, what is the height of the larger cone?
Answers
The height of the larger cone is 71.13 meters
What is the height of the larger cone?From the question, we have the following parameters that can be used in our computation:
Two similar cones have surface areas of 1883 square meters and 7532 square meters. Height of the smaller cone is 36 metersUsing the above as a guide, we have the following:
Scale factor = h1/h2
So, we have
h1/h2 = √(1883/7352)
substitute the known values in the above equation, so, we have the following representation
36/h2 = √(1883/7352)
So, we have
h2 = 36 * √(7352/1883)
Evaluate
h2 = 71.13
Hence, teh height is 71.13
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how many times greater is 4x10^2 than 10^4
Answers
Answer:
well 10^4 is 10000, and 4x10^2 is 1600 and if we divide 10000 by 1600 we can find out how many times greater 10000 is than 1600, and the anwser is 6.25
Step-by-step explanation:
Which of the following represents vector w = ❬–27, 35❭ in linear form?
w = –27i + 35j
w = 27i – 35j
w = –35i + 27j
w = 35i – 27j
Answers
Answer: w = –27i + 35j
Step-by-step explanation:
multiply 9/11 x 44/81
Answers
Answer:
Step-by-step explanation:
decimal: 0.44444444444
fraction: 4/9
You’re planning to buy a house and you want to have $35,000 to put as a down payment. If you have $20,000 today and you’re able to receive 12% interest rate for investing the money, how long will it take you to have enough money for the down payment saved?
Answers
It will take approximately 6.24 years to have enough money for the down payment saved.
How to calculate how long will it take you to have enough money for the down payment savedWe can use the formula for compound interest to solve this problem:
A = P(1 + r/n)^(nt)
where:
A = the amount of money we want to have (in this case, $35,000)
P = the initial amount we have (in this case, $20,000)
r = the annual interest rate (in this case, 12%)
n = the number of times interest is compounded per year (let's assume it's compounded monthly, so n = 12)
t = the number of years we're investing for (this is what we want to find)
Substituting the values we know:
$35,000 = $20,000(1 + 0.12/12)^(12t)
Simplifying:
1.75 = (1 + 0.01)^(12t)
Taking the natural logarithm of both sides:
ln(1.75) = 12t ln(1.01)
Dividing both sides by 12 ln(1.01):
t = ln(1.75) / (12 ln(1.01))
Using a calculator:
t ≈ 6.24 years
Therefore, it will take approximately 6.24 years to have enough money for the down payment saved.
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Solve the quadratic equation by completing the square.
2
x² - 4x-10=0
First, choose the appropriate form and fill in the blanks with the correct num
Then, solve the equation. Round your answer to the nearest hundredth.
If there is more than one solution, separate them with commas.
Answers
x^2 - 4x = 10
x^2 - 4x + 4 = 10 + 4
(x - 2)^2 = 14
x - 2 = (+-) sqrt 14
x = 2 (+-) sqrt 14
x = 2 + sqrt 14 and x = 2 - sqrt 14 <== ur solutions
Drag tiles to fill in the blanks for o complete the experience that could be used to predict the number of possible outcomes
Answers
The first blank will be filled by Option A: Total Number of Possible Outcomes. The second blank will be filled by Option B: Number of Winners
How to explain the probabilitySuppose that there are finite elementary events in the sample space of the considered experiment, and all are equally likely.
Then, suppose we want to find the probability of an event E.
= n(E) / n+S)
where favorable cases are those elementary events who belong to E, and total cases are the size of the sample space.
Thus, the first blank will be filled by Option A: Total Number of Possible Outcomes. The second blank will be filled by Option B: Number of Winners
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Drag tiles to fill in the blanks to complete the expression that could be used to predict the number of winners of a game. Tiles may be used once or not at all. A)Total Number of Possible Outcomes B)Number of Winners C)Number of Unfavorable Outcomes D)Number of Games P(event) = Number of Favorable Outcomes _________________________ ????????????????????????????? = ????????????????????????????? _________________________ 11 Total Number of Contestants
Find the surface area of the triangular prism. A triangular prism. The base is a right triangle with base and height 4 millimeters, and the third side 5.7 millimeters. The height of the prism is 3 millimeters.
Answers
The surface area of the triangular prism is approximately 44.29 square millimeters.
What is surface area?
Surface area is the total area that the surface of a three-dimensional object covers. It is a measure of the amount of space that the surface of an object occupies. Surface area is usually measured in square units such as square meters, square centimeters, square inches, or square feet.
What is the area?
The total space occupied by a flat (2-D) surface or the shape of an object is defined as its area.
The area of a plane figure is the space enclosed by its boundary.
According to the given information:
To find the surface area of a triangular prism, we need to add up the area of all the faces. A triangular prism has three rectangular faces and two triangular faces.
Let's start by finding the area of the triangular faces. The base of the triangular prism is a right triangle with base 4 millimeters, height 4 millimeters, and hypotenuse 5.7 millimeters. We can use the Pythagorean theorem to find the missing side:
[tex]a^2 + b^2 = c^2\\4^2 + 4^2 = 5.7^2[/tex]
16 + 16 = 32.49
32 = 32.49 - 0.49
32 = 32
So the missing side has length [tex]\sqrt{(5.7^2 - 4^2)} =3.69 millimeters.[/tex] This is the base of each triangular face.
The height of the triangular prism is 3 millimeters, so the height of each triangular face is also 3 millimeters.
The area of each triangular face is:
(1/2) × base × height
= (1/2) × 3.69 × 3
≈ 5.54 square millimeters
So the total area of the two triangular faces is:
2 × 5.54= 11.08 square millimeters
Now let's find the area of each rectangular face. The length of each rectangular face is the same as the base of the triangular face, which is 3.69 millimeters. The width of each rectangular face is the height of the triangular prism, which is 3 millimeters.
The area of each rectangular face is:
length × width
= 3.69 × 3
≈ 11.07 square millimeters
So the total area of the three rectangular faces is:
3 × 11.07
= 33.21 square millimeters
To find the surface area of the triangular prism, we add up the area of all five faces:
11.08 + 33.21
= 44.29 square millimeters
Therefore, the surface area of the triangular prism is approximately 44.29 square millimeters.
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A side of an equilateral triangle is 20 cm long. What is the area of the triangle
Answers
Complete the worksheet below please
Answers
Answer:
x= 3 cm
Explanation:
I am bad at it
the probability of rolling a 4 or an even number of the die is thrown 2 times. (6 sided dice)
Answers
The probability of rolling a 4 on a single throw of a fair 6-sided die is 1/6, since there is only one way to roll a 4 and there are 6 equally likely outcomes in total.
The probability of rolling an even number on a single throw of a fair 6-sided die is 3/6, or 1/2, since there are three even numbers (2, 4, and 6) out of six possible outcomes.
To find the probability of rolling a 4 or an even number on a single throw, we can add the probabilities of these two events:
P(4 or even) = P(4) + P(even) - P(4 and even)
where P(4 and even) is the probability of rolling a 4 and an even number on the same throw. Since there is only one outcome (rolling a 4), which is not even, this probability is 0.
Therefore:
P(4 or even) = P(4) + P(even) - P(4 and even)
= 1/6 + 1/2 - 0
= 2/3
So the probability of rolling a 4 or an even number on a single throw of a 6-sided die is 2/3.
If the die is thrown 2 times, the probability of rolling a 4 or an even number on both throws is the product of the probabilities of rolling a 4 or an even number on each throw:
P(4 or even on both throws) = P(4 or even) × P(4 or even)
= (2/3) × (2/3)
= 4/9
Therefore, the probability of rolling a 4 or an even number on both throws of a 6-sided die is 4/9.