Question

A rectangle’s length is represented by the expression (3x + 9). The width is represented by the expression (2x – 5). Which expression represents the perimeter of the rectangle?

A.
5x + 4

B.
5x + 14

C.
10x + 8

D.
10x + 13

Answer 1

Explanation:

The perimeter of a rectangle is

P=2(L+W)

We are given L=3x+9 and W=2x-5 so

P=2(3x+9+2x-5)

P=2(5x+4)

P=10x+8

Answer C