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3 years ago

Which situation could NOT represent a proportional relationship?

Mathematics

1 answer:

RideAnS [48]3 years ago

5 0

Answer:

i think its b

Step-by-step explanation:

because all of the other answers do have a reasonable explanation on how to do it while the b one has to explanation on how to do it

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How could you model 5 students sharing 4 bags of popcorn equally? How much will each student get?

lara [203]

4/5=.8 of a bag each

3 0

3 years ago

Use the value of the linear correlation coefficient r to find the coefficient of determination and the percentage of the total v

sergiy2304 [10]

Answer:

Step-by-step explanation:

Given that $r = 0.952$

We have coefficient of determination

$r^2 =0.952^2\\=0.906304$

=90.63%

This implies that nearly 91% of variation in change in dependent variable is due to the change in x.

The coefficient of determination is the square of the correlation (r) between predicted y scores and actual y scores; thus, it ranges from 0 to 1.

An R2 of 0 means that the dependent variable cannot be predicted from the independent variable.

An R2 of 1 means the dependent variable can be predicted without error from the independent variable.

5 0

3 years ago

2x + y = 4 -4x – 2y = -8 Solve the system of equations

Ivenika [448]

Answer: y = 4 − 2 x

Step-by-step explanation: :)

6 0

3 years ago

The combined area of a square and a rectangle is 225 square yards. the length of the rectangle is 8 times the width of the recta

snow_lady [41]

Answer:

The rectangle: L = 40 yards. W = 5 yards

The square: The length and width are both 5 yards.

Step-by-step explanation:

Let L and W be the length and width of the rectangle.

Let l and w be the length and width of the square.

Area for each is:

Rectangle: L*W

Square: l*w

We are told that L*W + l*w = 225 yards^2

We are also told that

L = 8W

and that

l = W

Since the sides of a square are all equal, w is also W: w=W

Summarizing and substituting:

L*W + l*w = 225 yards^2

(8W)*W + W*W = 225 yards^2

8W^2 + W^2 = 225 yards^2

9W^2 = 225 yards^2

W^2 = 25

W = 5 feet

---------------------

Therefore, since L = 8W , L = 40 yards. W = 5 yards for the rectangle.

The square: l=W, so l = 5 yards, and thus w=5 yards

--------------------------

Check:

Do a rectangle of 40' x 5' plus a square of 5' x 5' have a total combined area of 225 yards^2?

40yd x 5yd + 5yd x 5yd = 225 yards^2?

200 yd^2 + 25 yd^2 = 225 yards^2?

YES

5 0

2 years ago

Which of the following is equivalent to (125^2/ 125^4/3)

zysi [14]

Option D:

The expression equivalent to the given expression is 25.

Solution:

The image of the question is attached below.

Given expression:

$$\left(\frac{125^{2}}{125^{\frac{4}{3}}}\right)$

To find which expression is equivalent to the given expression:

$$\left(\frac{125^{2}}{125^{\frac{4}{3}}}\right)$

125 can be written as 5 × 5 × 5 = 5³

$$=\frac{(5^3)^{2}}{(5^3)^{\frac{4}{3}}}$

Using the exponent rule: $\left(a^{m}\right)^{n}=a^{(m n)}$

$$=\frac{5^6}{5^{\frac{12}{3}}}$

$$=\frac{5^6}{5^4}$

Using the exponent rule: $\frac{a^{m}}{a^{n}}=a^{m-n}$

$=5^{(6-4)}$

= 5²

= 25

$$\left(\frac{125^{2}}{125^{\frac{4}{3}}}\right)=25$

The expression equivalent to the given expression is 25.

Option D is the correct answer.

7 0

3 years ago