Question

PLZ HURRY ITS TIMEDDD

The perimeter of a square is 80-64y units. Which expression can be used to show the side length of one side of the square?
A. 16(5-4y): Each side measures 5-4y units.
B. 16y(5-4): Each side measures 5-4 units.
C. 4(20-16y): Each side measures 20-16y units.
D. 4y(20-16): Each side measures 20-16 units.

Answer 1

Option C. 4(20-16y): Each side measures 20-16y units.

Explanation:

we know that

The perimeter of a square is equal to

`P=4b`

where

b is the length side of the square

we have

`P=(80-64y)\ units`

substitute the given value in the formula

`(80-64y)=4b`

solve for b

Divide by 4 both sides

`(20-16y)=b`

Rewrite the expression

`b=(20-16y)\ units`

Alternative Method

we have

`P=(80-64y)\ units`

Factor 4

`P=4(20-16y)\ units`

so

Each side measures (20-16y) units.