Question

A rectangle has side lengths of 9x+12 and 3x+7. What is the perimeter

Answer 1

24x+38

I just doubled each side and got this

Answer 2

B. 24x + 38

Explanation:

Since this is a rectangle, there will be a pair of sides that are the same. With perimeter, add up the side lengths.

`2(9x+12)+2(3x+7)\\\\18x+24+6x+14\\\\24x+38`