Question

A rectangle has the width of r+3 and a length of 2r+9. What is the perimeter of the rectangle

Answer 1

There are 4 sides to a rectangle and there are 2 sets of parallel sides equal in length. To calculate the perimeter you need to do 2(r+3) + 2(2r+9) which equals 6r+24. Hope this helps.

Answer 2

6r+24

Explanation:

2(r+3)=2r+6

2(2r+9)=4r+18

(2r+6)+(4r+18)=6r+24