Question

The formula for the perimeter of a rectangle is P = 2l + 2w. The length of a rectangle is 7 units longer than its width.

Which expression represents the perimeter of the rectangle?

Answer 1

`P=2l+2w`
if

`l=w+7`
we can plug this expression for the length into the first equation and get:

`P=2(w+7)+2w=4w+14=2(2w+7)`

Answer 2

the expression to represent the perimeter of the rectangle is:
2(w + 7) + 2w