Question

Elise built a rectangular vegetable garden that is 9 feet long and has an area of 72 square feet.

Answer 1

You have to understand first that perimeter equals the length (9 ft.) X2 plus the height X2. In this case, the area of the rectangle is 72 ft, so divide 72 by 9 to get 8, which is the width. Plug this number back into the perimeter formula and you get 34. 

Answer 2

Area = l*w
so 9 * 7= 72
perimiter it l+l+w+w
so 9+9+7+7= 32