9. In a recent taste test, 1017 out of 1250 people could not tell the difference between a popular soda's original flavor and the new calorie-fre
difference. Find a test statistic for the proportion.
z = 2.21
z = 1.38
z = 1.20
z = 0.39

A is 0.8218

A is 0.6905.

(a) The probability that the student is a woman.The number of women in the class is 31 while the total number of students is 42. The probability of a randomly selected student being a woman is given as:P(woman) = (Number of women in the class) / (Total number of students in the class)P(woman) = 31 / 42P(woman) = 0.7381(b) The probability that the student received an A.The number of men and women that received an A is given as follows:Men that received an A = 6Women that received an A = 7The total number of students that received an A is:Total number of students that received an A = (Number of men that received an A) + (Number of women that received an A)Total number of students that received an A = 6 + 7Total number of students that received an A = 13The probability of a randomly selected student receiving an A is given as:P(A) = (Number of students that received an A) / (Total number of students in the class)P(A) = 13 / 42P(A) = 0.3095(c) The probability that the student is a woman or received an A.The probability of the student being a woman or received an A is given as:P(woman or A) = P(woman) + P(A) - P(woman and A)From parts (a) and (b), we know that:P(woman) = 0.7381P(A) = 0.3095Now, we have to determine the probability that the student is a woman and received an A.The number of women that received an A = 7 while the total number of women in the class is 31.The probability of a woman receiving an A is given as:P(woman and A) = (Number of women that received an A) / (Total number of women in the class)P(woman and A) = 7 / 31P(woman and A) = 0.2258Therefore:P(woman or A) = P(woman) + P(A) - P(woman and A)P(woman or A) = 0.7381 + 0.3095 - 0.2258P(woman or A) = 0.8218(d) The probability that the student did not receive an A.The probability that the student did not receive an A is given as:P(not A) = 1 - P(A)From part (b), we know that:P(A) = 0.3095Therefore:P(not A) = 1 - P(A)P(not A) = 1 - 0.3095P(not A) = 0.6905Therefore, the answers are given as follows:(a) The probability that the student is a woman is 0.7381.(b) The probability that the student received an A is 0.3095.(c) The probability that the student is a woman or received an A is 0.8218.(d) The probability that the student did not receive an A is 0.6905.

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Polynomial with a degree 4 and leading coefficient 1 is to be found. Also, -4 and 2 are the zeros of multiplicity 2.

Given the roots, the polynomial can be expressed in factored form as:
\[f(x) = (x + 4)^2(x - 2)^2\]
Expanding this:
\begin{align*}
f(x) &= (x + 4)^2(x - 2)^2\\
&= (x^2 + 8x + 16)(x^2 - 4x + 4)\\
&= x^4 + 4x^3 - 4x^3 - 32x^2 + 16x^2 + 128x + 64\\
&= x^4 - 16x^2 + 128x + 64
\end{align*}
Thus, the polynomial is:
\[f(x) = x^4 - 16x^2 + 128x + 64\]Therefore, the answer is \[f(x) = x^4 - 16x^2 + 128x + 64\].

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Answer:

please mark as brainliest

Therefore, there exists a value c in the interval (4, 7) such that f'(c) = -1, as required.

If any vertical line drawn may cross the graph at no more than one point, the graph is a function. If there is any spot on the graph where a vertical line can cross it at two or more points, the graph is not a function.

By the mean value theorem, there exists a point c in the interval (4, 7) such that:

f'(c) = (f(7) - f(4))/(7 - 4)

Substituting the given values, we get:

f'(c) = (4 - 7)/(7 - 4) = -1/3

Now, we need to show that there exists a value c in the interval (4, 7) such that f'(c) = -1.

Let g(x) = f(x) + x. Then, g(4) = f(4) + 4 = 11 and g(7) = f(7) + 7 = 11.

By Rolle's theorem, there exists a point c in the interval (4, 7) such that g'(c) = 0.

Now, g'(c) = f'(c) + 1, so we have:

f'(c) + 1 = 0

f'(c) = -1

Therefore, there exists a value c in the interval (4, 7) such that f'(c) = -1, as required.

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The vertices of the dilated polygon A'B'C'D' are A'(-3, 4.5), B'(-1.5, 1.5), C'(3, -1.5), and D'(3, 3). the correct option is (A) A′(−3, 4.5), B′(−1.5, 1.5), C′(3, −1.5), D′(3, 3).

What is polygon?

A polygon is a closed plane figure that is formed by three or more straight sides, which are connected end-to-end to create a closed shape.

To find the vertices of the dilated polygon, we need to apply the scale factor of 3/4 to each of the original vertices. This will result in a new set of coordinates for each vertex.

The coordinates of point A' can be found by multiplying the x-coordinate and y-coordinate of A by 3/4:

x-coordinate of A' = -4 × 3/4 = -3

y-coordinate of A' = 6 × 3/4 = 4.5

Therefore, A' has coordinates (-3, 4.5).

Using the same method, we can find the coordinates of the other vertices:

B':

x-coordinate of B' = -2 × 3/4 = -1.5

y-coordinate of B' = 2 × 3/4 = 1.5

Therefore, B' has coordinates (-1.5, 1.5).

C':

x-coordinate of C' = 4 × 3/4 = 3

y-coordinate of C' = -2 × 3/4 = -1.5

Therefore, C' has coordinates (3, -1.5).

D':

x-coordinate of D' = 4 × 3/4 = 3

y-coordinate of D' = 4 × 3/4 = 3

Therefore, D' has coordinates (3, 3).

Thus, the vertices of the dilated polygon A'B'C'D' are A'(-3, 4.5), B'(-1.5, 1.5), C'(3, -1.5), and D'(3, 3). Therefore, the correct option is (A) A′(−3, 4.5), B′(−1.5, 1.5), C′(3, −1.5), D′(3, 3).

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Using Pythagorean theorem to calculate the distance of the charges, the electric potential is -93V

The electric potential at point P can be calculated using the formula:

[tex]V=\frac{1}{4\pi\epsilon_0}\frac{q_1}{r_1}+\frac{1}{4\pi\epsilon_0}\frac{q_2}{r_2}[/tex]

where [tex]\epsilon_0[/tex] is the vacuum permittivity, q1 and q2 are the charges, and r1and r2 are the distances from the charges to point P.

To find r1 and r2, we can use the Pythagorean theorem:

[tex]r_1=\sqrt{(0.1\text{ m})^2+(0.15\text{ m})^2}=0.18\text{ m}[/tex]

[tex]r_2=\sqrt{(0.1\text{ m})^2+(0.25\text{ m})^2}=0.27\text{ m}[/tex]

Substituting the values into the formula, we get:

[tex]V=\frac{1}{4\pi\epsilon_0}\frac{-5.0\times10^{-6}\text{ C}}{0.18\text{ m}}+\frac{1}{4\pi\epsilon_0}\frac{5.0\times10^{-6}\text{ C}}{0.27\text{ m}}[/tex]

Using the value of vacuum permittivity

[tex]\epsilon_0=8.85\times10^{-12}\text{ F/m}[/tex]  we get:

[tex]V=-267\text{ V}+174\text{ V}= -93\text{ V}[/tex]

Therefore, the electric potential at point P is -93 V.

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The line on the graph will be a straight line passing through the points (3,5) and (-3,2).

To draw a straight line y=2 - x, first plot the given points on the graph, (3,5) and (-3,2). Draw a straight line between these two points. This line will be the graph of the equation y=2 - x. To find the equation, take the x-value of the first point, 3, and subtract it from the y-value of the same point, 5. This is the equation of the line, y=2 - x. With the equation of the line, we can now draw a line on the graph that passes through the two given points. The line will be a straight line, with a slope of -1 and a y-intercept of 2.

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The third column of the inverse of the matrix, A = [tex]\begin{bmatrix}-2 & -5 & -13 \\4 &5 &11 \\1 &2 &6 \\\end{bmatrix}[/tex], obtained using the product of A and the third column of A⁻¹ is; [tex]\begin{bmatrix} 1 \\ -3\\ 1 \\\end{bmatrix}[/tex]

The product of a matrix and the inverse of the matrix is the multiplicative identity.

The specified matrix can be presented as follows;

A = [tex]\begin{bmatrix}-2 & -5 & -13 \\4 & 5 & 11 \\1 &2 & 6 \\\end{bmatrix}[/tex]

The third columns of the inverse of the matrix, A, A⁻¹, can be obtained without computing the other two columns, as follows;

The inverse of the matrix A, A⁻¹ is the solution of the following matrix equation;

Ax = [tex]e_i[/tex]

Where;

[tex]e_i[/tex] = The column i of the identity matrix

x = The third column of the inverse matrix

Therefore, for the third column, we get;

[tex]e_i[/tex] = [tex]e_3[/tex] = [tex]\begin{bmatrix}0 \\ 0\\1\\\end{bmatrix}[/tex]

Ax = [tex]e_3[/tex] = [tex]\begin{bmatrix}0 \\ 0\\1\\\end{bmatrix}[/tex]

Therefore;

x = [tex]e_i[/tex]/X, which using a graphing calculator, indicates;

[tex]x = \frac{\begin{bmatrix}0 \\ 0\\1\\\end{bmatrix}}{\begin{bmatrix}-2 & -5 & -13 \\4 & 5 & 11 \\1 &2 & 6 \\\end{bmatrix}} = \begin{bmatrix}1 \\ -3\\1\\\end{bmatrix}[/tex]

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The data which is given in the question is the time for tamara to read the book can be seen in a table with its respective values.

What is table?

Table is something which has rows and columns and the data is inserted into it.

Table has no restriction for the number of rows and columns. One can insert any rows and columns in the table according to their preferences.

Now in the above question,

    Tamara read 35 pages in 42.5 minutes.

    Tamara read 41 pages in 59 minutes.

     Tamara read 56 pages in 72 minutes.

The table will be     Pages               Time

                                 35                     42.5

                                  41                      59

                                  56                     72

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Answer:

a = 3, b = 4

Step-by-step explanation:

[tex]3a-2b=1\\7a-b=17\\\\[/tex]

Multiply second equation by 2

[tex]3a-2b=1\\14a-2b=34\\[/tex]

Subtract the equations

[tex]3a-2b=1\\-(14a-2b=34)\\\\-11a=-33\\a=3[/tex]

Plug back in to either original equation to solve for b

[tex]3(3)-2b=1\\9-2b=1\\-2b=-8\\b=4[/tex]

Solution:

(3,4)

The probability that on a given day, the price of a pound of bacon is more than twice as expensive as a dozen eggs is 0.0001. The probability that Ron paid more than $50 for the bacon and eggs is 0.0028.

(a) To find the probability that on a given day, the price of a pound of bacon is more than twice as expensive as a dozen eggs, we need to use the normal distribution formula. This is given by P(x > 2y) = P(X > 2µy + 2σy) = P(Z > (2µy + 2σy - µx) / σx) = P(Z > (2(1.90) + 2(0.06) - 4.10) / 0.16) = P(Z > -4.24) = 1 - P(Z < -4.24) = 1 - 0.9999 = 0.0001

(b) To find the probability that Ron paid more than $50 for the bacon and eggs, we need to calculate the probability that the 10 pounds of bacon and 6 dozen eggs cost more than $50. This is given by P(10x + 6y > 50) = P(10X + 6µy + 6σy > 50) = P(Z > (50 - 10µx - 6µy - 6σy) / (√10σx + √6σy)) = P(Z > (50 - 10(4.10) - 6(1.90) - 6(0.06)) / (√10(0.16) + √6(0.06)) = P(Z > -2.87) = 1 - P(Z < -2.87) = 1 - 0.9972 = 0.0028.

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Answer:

Step-by-step explanation:

9

Answer:

One expression for the length of one of the equal sides

is x = (934 - 214) / 2.

Step-by-step explanation:

The perimeter is the sum of the 3 sides of the triangle.

Let the length of one of the equal sides be x cm

So, we have:

2x + 214 = 934

2x = 934 - 214 = 720

x = 720 /2 = 360 cm.

a) The interval would be:Interval = $12.50 ± ($51.50 x 3)Interval = $12.50 ± $154.50 Interval = ($12.50 - $154.50, $12.50 + $154.50)Interval = (-$142.00, $179.00)

b) The interval would be:Interval = $12.50 ± ($51.50 x 1)Interval = $12.50 ± $51.50 Interval = ($-39.00, $64.00)This interval can be considered usual since it includes about 68% of the data.

c) A pizza that costs $10 is about 0.049 standard deviations below the mean.

Use the Empirical Rule to make an interval that should include 99.7% of the data.The Empirical Rule, also known as the 68-95-99.7 rule, is a statistical rule that states that for a normal distribution, about 68% of observations will fall within one standard deviation of the mean, about 95% will fall within two standard deviations, and about 99.7% will fall within three standard deviations.To make an interval that should include 99.7% of the data, we need to find the mean plus/minus three standard deviations. The mean is given as $12.50, and the standard deviation is given as $51.50. Therefore, the interval would be:Interval = $12.50 ± ($51.50 x 3)Interval = $12.50 ± $154.50Interval = ($12.50 - $154.50, $12.50 + $154.50)Interval = (-$142.00, $179.00)

Use the Empirical Rule to make an interval that would be considered usual.Again, we can use the Empirical Rule to find an interval that would be considered usual. This would be the interval that falls within one standard deviation of the mean. The mean is given as $12.50, and the standard deviation is given as $51.50. Therefore, the interval would be:Interval = $12.50 ± ($51.50 x 1)Interval = $12.50 ± $51.50 Interval = ($-39.00, $64.00)This interval can be considered usual since it includes about 68% of the data.

Find the z-score of a pizza that costs $10.The z-score is a measure of how many standard deviations a data point is from the mean. To find the z-score of a pizza that costs $10, we first need to find the difference between $10 and the mean of $12.50, and then divide that difference by the standard deviation of $51.50.z-score = (10 - 12.50) / 51.50z-score = -0.049 This means that a pizza that costs $10 is about 0.049 standard deviations below the mean.

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The value for the expression is obtained as -7/4.

What is an expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.

To evaluate the expression 12.5 - 31/2 + 1 1/4, we need to convert the mixed number 1 1/4 to an improper fraction -

1 1/4 = 5/4

Now we can substitute the values into the expression and simplify -

Substitute 1 1/4 with 5/4 -

= 12.5 - 31/2 + 1 1/4

= 12.5 - 31/2 + 5/4

Convert 12.5 to an improper fraction with a denominator of 2 -

= 25/2 - 31/2 + 5/4

Get a common denominator of 4 -

= (50)/(4) - (62)/(4) + 5/4

= 55/4 - 62/4

= -7/4

Therefore, the value is -7/4.

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Option A  -026 is the correct answer

The standard normal distribution represents a normal distribution with a mean of 0 and a standard deviation of 1. It is also known as the z-distribution.What is the z-score formula?The z-score formula is: z = (x - μ) / σ where z is the z-score, x is the raw score, μ is the mean, and σ is the standard deviation.In a standard normal distribution, an area of 0.3974 on the right corresponds to a z-score of -0.26. This is option A. Therefore, option A is the correct answer.

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There are 64 cups in 8 gallons.

To find the number of cups in 8 gallons, you can use the conversion rate of 8 cups per gallon. This means that the formula to find the number of cups in 8 gallons is:

Cups = 8 x Gallons

Thus, the calculation to find the number of cups in 8 gallons is:

Cups = 8 x 8

Cups = 64

Therefore, there are 64 cups in 8 gallons. This calculation shows that for every gallon, there are 8 cups. To find the number of cups in any number of gallons, you can multiply the number of gallons by 8. This calculation can be seen in the formula:

Cups = 8 x Gallons

By using this formula, you can easily find the number of cups in any number of gallons.

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b =(17,6x 8,9):19,7=7,95

The interquartile range (IQR) of the given data set is 4, calculated by subtracting the third quartile (Q3) from the first quartile (Q1).

An indicator of a data set's statistical dispersion is the interquartile range (IQR). The third quartile (Q3) is subtracted from the first quartile to compute it (Q1). The middle 50% of the data's spread is measured by the IQR.In the given data set, the data points are 2, 3, 5, 5, 6, 6, 7, 8, 9, 9, 2004, 2008. We first need to arrange the data points in ascending order, which will be 2, 3, 5, 5, 6, 6, 7, 8, 9, 9, 2004, 2008.  To calculate the IQR, we first need to calculate the first quartile and the third quartile. The first quartile is the median of the lower half of the data set, which is 5. The third quartile is the median of the upper half of the data set, which is 9. The IQR is calculated by subtracting the third quartile (Q3) from the first quartile (Q1). Therefore, the IQR of the given data set is 4 (9 - 5 = 4).

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Answer:

g/7

Step-by-step explanation:

Answer:G/7

Step-by-step explanation:G/7

The volume of the part of the cone that is filled with sand is 2/9 times the total volume of the cone.

To do this, we need to first determine the total volume of the cone. The formula for the volume of a cone is:

V = 1/3 x π x r² x h

Where V is the volume, r is the radius of the base of the cone, h is the height of the cone, and π is a mathematical constant (approximately equal to 3.14).

Since we know that the paper cup is cone-shaped, we can assume that it has a circular base. Let's say that the radius of the base of the cone is r and the height of the cone is h.

The total volume of the cone can be calculated using the formula above:

V = 1/3 x π x r² x h

Now we need to determine the volume of the part of the cone that is filled with sand. We know that the cup is 2/3 full of sand, so the volume of sand in the cup is 2/3 of the total volume of the cup. We can express this as:

V = 2/3 x V

We can substitute the formula for V into this equation to get:

V  = 2/3 x (1/3 x π x r² x h)

Simplifying this equation, we get:

V = 2/9 x π x r² x h

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Answer: Theoretical probability is based on mathematical analysis and predictions, while experimental probability is based on actual data collected through repeated trials or experiments.

For example, the theoretical probability of tossing a fair coin and getting heads is 1/2, because there are two equally likely outcomes (heads and tails) and only one of them is heads.

On the other hand, the experimental probability of tossing heads can be found by conducting multiple trials of coin flips and recording the frequency of getting heads. As the number of trials increases, the experimental probability should approach the theoretical probability.

Therefore, the best comparison between theoretical and experimental probability of tossing heads is that the theoretical probability is based on mathematical analysis and predictions, while the experimental probability is based on actual data collected through repeated trials or experiments. The two probabilities may be similar or different, but as the number of trials increases, the experimental probability should converge to the theoretical probability.

Step-by-step explanation:

The factored form of the expression 25a² - 30a + 9 is (5a - 3)².

Given the expression in the question;

25a² - 30a + 9

To factor completely, first rewrite the expression as as follows;

25a² - 30a + 9

rewrite 25a² as ( 5a )²

( 5a )² - 30a + 9

rewrite 9 as 3²

( 5a )² - 30a + 3²

Now, check that the middle term is two times the product of the numbers being squared in the first and third term.

30a = 2 × ( 5a ) × 3

Next, rewrite the polynomial;

( 5a )² - 2 × ( 5a ) × 3 + 3²

( 5a )² - 2( 5a )3 + 3²

Factor using the perfect square trinomial rule.

a² - 2ab + b² = ( a - b )²

Here; a = 5a and b = 3

Hence, we have;

(5a - 3)²

Therefore, the factored form is (5a - 3)².

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Answer:

third option

Step-by-step explanation:

Volume of a cone = V = πr²(h/3)

Where,

Here we are given the following :

Note that we are asked to find the volume in square feet so we must first convert the height and radius into feet

Converting given values

By plugging these values into the formula we acquire

V = (3.14)(124.6704²)(177.1632/3)

==> evaluate exponent

V = (3.14)(15542.7086362)(177.1632/3)

==> divide 177.1632 by 3

V = (3.14)(15542.7086362)(59.0544)

==> multiply 3.14 and 15542.7086362

V = 48804.1051175(59.0544)

==> multiply 48804.1051175 and 59.0544

V = 2882097.1 ft² (rounded to the nearest tenth)

The volume of the cone is 2882097.1 so the correct answer choice is the third option.

Important note : Its important to note that we must convert meters to feet before finding the volume. If we try to convert after finding the volume, our answer will be incorrect.

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At 90% confidence, the lower confidence limit for the proportion students passing with 3 decimal places is  0.563.

To find the lower confidence limit for the proportion of students passing, we need to use the formula for confidence interval of a proportion:

Lower limit = sample proportion - z*standard error

where z is the z-score associated with the confidence level, and standard error is the standard deviation of the sampling distribution of the proportion.

First, let's calculate the sample proportion of students passing:

proportion passing = 82.0% = 0.820

Next, we need to calculate the standard error:

standard error = sqrt(p*(1-p)/n)

where p is the sample proportion, and n is the sample size.

standard error = sqrt(0.820*0.180/19) = 0.154

Now we need to find the z-score associated with the 90% confidence level. We can use a standard normal distribution table or a calculator to find that the z-score is 1.645.

Finally, we can plug in the values to find the lower confidence limit:

Lower limit = 0.820 - 1.645*0.154 = 0.563

Rounding to 3 decimal places, the lower confidence limit for the proportion of students passing is 0.563.

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The capacity of Leo's container is (WH x L) / 2, where W, H, and L represent the width, height, and length of the container, respectively.

To find the capacity of Leo's container, we need to calculate its volume. The volume of a rectangular prism is calculated by multiplying its length, width, and height. We can express this formula mathematically as:

Volume = Length x Width x Height

Since we do not have the exact measurements of the container, we cannot determine the exact volume.

The surface area of a rectangular prism is given by the formula:

Surface Area = 2 x (Length x Width + Width x Height + Length x Height)

Therefore, we can set the equation for surface area equal to the equation for the total surface area of the container:

Surface Area = 2 x (Length x Width + Width x Height + Length x Height) = Total Surface Area of Container

Then we have:

Total Surface Area of Container = 2LW + 2WH + 2HL Surface Area of Material = 6LW

Since the material covers all six sides, we can set the surface area of the material equal to the total surface area of the container:

6LW = 2LW + 2WH + 2HL

Simplifying this equation, we get:

4LW = 2WH + 2HL

Dividing by 2, we get:

2LW = WH + HL

Multiplying by the height, we get:

2LWH = WH² + HL²

Now, we can rearrange this equation to get the volume of the container:

Volume = Length x Width x Height = (WH x L) / 2

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Complete Question:

Leo made a container to store his camping gear. The container is in the shape of a rectangular prism. The container has material covering all six sides.

What is the capacity of the container?

since it has a diameter of 78, then its radius is half that, or 39.

[tex]\textit{area of a circle}\\\\ A=\pi r^2 ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=39 \end{cases}\implies A=\pi (39)^2\implies A\approx 4778.36~cm^2[/tex]

Answer:

FG = 25.6

Step-by-step explanation:

ABC to DEC = 5:2

DEC to FEG = 1:4

so,

ABC to FEG = 5/2 × 1/4 = 5:8

that means the scaling factor from small to large is 8/5.

therefore,

EG = BC × 8/5 = 10×8/5 = 2×8 = 16

the side length ratio for ABC tells us

AB:BC:AC = 5 : 2 1/2 : 4

BC = 10

so,

AB:BC = 5 : 2 1/2 = 5 : 2.5

AB:10 = 5 : 2.5

2.5AB = 50

AB = 50/2.5 = 20

AC:AB = 4:5

AC:20 = 4:5

AC = 20×4/5 = 80/5 = 16

FG = AC × 8/5 = 16 × 8/5 = 128/5 = 25.6

Answer:

-3

Step-by-step explanation:

a² = 64

Taking the square root of both sides, we get:

a = ±√64

a = ±8

Therefore, the solutions to the equation a² = 64 are a = 8 and a = -8.

2x-2 = 16

Adding 2 to both sides, we get:

2x = 18

Dividing both sides by 2, we get:

x = 9

Therefore, the solution to the equation 2x-2 = 16 is x = 9.

3y² = 27

Dividing both sides by 3, we get:

y² = 9

Taking the square root of both sides, we get:

y = ±√9

y = ±3

Therefore, the solutions to the equation 3y² = 27 are y = 3 and y = -3.