Question

whoever​ can answer this is awesome and is a genius plz help urgent

Answer 1

Answer:

the side length is 30 feet

Step-by-step explanation:

we are given cost equation as

$C=\frac{n^2}{5}+175$

where

C is the cost in dollars

n is a side length in feet

we are given

cost is $355

so, C=355

we can set C=355

and then we can solve for n

$355=\frac{n^2}{5}+175$

we can subtract both sides by 175

$355-175=\frac{n^2}{5}+175-175$

$\frac{n^2}{5}=180$

Multiply both sides by 5

$5\times \frac{n^2}{5}=5\times 180$

$n^2=900$

now, we can take sqrt both sides

$n=\sqrt{900}$

$n=30$

So,

the side length is 30 feet