Question

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?

Answer 1

C. 

A square has 4 sides, the perimeter of a square is hence an addition of the length of the 4 sides. the answer (c) clearly shows it.

Answer 2

Answer:

Option C is correct

4(20-16y) each side measures 20-16y units

Step-by-step explanation:

The distributive property says that:

$a \cdot(b+c) = a \cdot b+ a\cdot c$

The perimeter(P) of a square is given by:

$P = 4 \cdot (Side)$           .....[1]

As per the statement:

The perimeter of a square is 80-64y units

we can write this as:

$80-64y = 4 \cdot 20 - 4 \cdot 16y$

Apply the distributive property we have;

$80-64y = 4(20-16y)$

⇒P = 4(20-16y)

On comparing with [1] we have;

Each Side length = 20-16y units

Therefore, an expression can be used to show the side length of one side of the square is, 4(20-16y) each side measures 20-16y units