Mathematics: So we have a small issue. i dont know how to figure this out and i dont know what equivalent means : / so if you can me that would be great. make sure you tell me how you got that answer. you

So we have a small issue. i dont know how to

Ответ:

cutechickens13

10.01.2022

Equivalent means "equal to"

Because we are looking for an equation that is not equivalent to 3y + x = 18, we need to find one that is not equal to 3y + x = 18.

First, lets try y = 6 - 1/3x

3y + x = 18

Divide the whole of both sides by 3

y + 1/3x = 6

Then, subtract 1/3x from each side

y = 6 - 1/3x

So, y = 6 - 1/3x IS equivalent to 3y + x = 18, so it is not the answer.

Next, lets try y - 5 = -1/3 (x - 3)

First, we need to distribute the -1/3 in the right side.

y - 5 = -1/3x + 1

Add 5 to each side

y = -1/3x + 6

Add 1/3x to each side

y + 1/3x = 6

So, y + 1/3x = 6 is NOT equivalent to 3y + x = 18, so it IS an answer.

Lets try the third one: y - 5 = 1/3(x + 3)

We need to use distributive property again on the right side

y - 5 = 1/3x + 1

Add 5 to each side

y = 1/3x + 6 is not equivalent to 3y + x = 18 so it IS and answer

Lets test the last one: 6y + 2x = 36

Divide the whole of each side by 2

3y + x = 18 IS equivalent to 3y + x = 18 so it is NOT an answer

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Ответ:

anissa760

07.12.2020

Mathematics

$\boxed{Perimeter \: of \: semicircle = 61.68 \: feet}$

Given:

$\sf Area \: of \: semicircle = 226.08 \: square \: feet$

To find:

Perimeter of semicircle

Step-by-step explanation:

Let 'r' be the radius of circle

$\sf \implies Area \: of \: semicircle = \frac{ \pi {r}^{2} }{2} \\ \\ \sf \implies 226 .08 = \frac{\pi {r}^{2} }{2} \\ \\ \sf \implies \frac{\pi {r}^{2} }{2} = 226.08 \\ \\ \sf \implies \pi {r}^{2} = 2 \times 226.08 \\ \\ \sf \implies \pi {r}^{2} = 452.16 \\ \\ \sf \implies 3.14 \times {r}^{2} = 452.16 \\ \\ \sf \implies {r}^{2} = \frac{452.16}{3.14} \\ \\ \sf \implies {r}^{2} = 144 \\ \\ \sf \implies {r}^{2} = {12}^{2} \\ \\ \sf \implies \sqrt{ {r}^{2} } = \sqrt{ {12}^{2} } \\ \\ \sf \implies r = 2 \: feet$

So,

$\sf Perimeter \: of \: semicircle = \pi r + 2r \\ \\ \sf =( 3.14 \times 12) +( 2 \times 12)\\ \\ \sf = 37.68 + 24 \\ \\ \sf = 61.68 \:ft$

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So we have a small issue. i dont know how to figure this out and i dont know what equivalent means : / so if you can me that would be great. make sure you tell me how you got that answer. you

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