Answer:Acid Rain
Step-by-step explanation:
Answer:
Option C. 4(20-16y): Each side measures 20-16y units.
Step-by-step explanation:
we know that
The perimeter of a square is equal to

where
b is the length side of the square
we have

substitute the given value in the formula

solve for b
Divide by 4 both sides

Rewrite the expression

<em>Alternative Method</em>
we have

Factor 4

so
Each side measures (20-16y) units.
9y^3+8y=4y+18y^2
9y^3-18y^2+4y=0
*Divide the whole thing by y
9y^2-18y+4=0
*use quadratic formula to solve
Add 1
0.7+1=1.7
1.7+1= 2.7
etc., etc.