Answer:
length = 10 ft, width = 9 ft
Explanation:
The opposite sides are congruent
The perimeter (P) = 38 and is the sum of the 4 sides, then
15 - 2x + 15 - 2x + x + 7 + x + 7 = 38 , that is
- 2x + 44 = 38 ( subtract 44 from both sides )
- 2x = - 6 ( divide both sides by - 2 )
x = 3
Then
length = x + 7 = 3 + 7 = 10 ft
width = 15 - 2x = 15 - 2(3) = 15 - 6 = 9 ft