A+c = 150
10.25a+7.75c = 1470
36
a= 1/2 b x h
= 5cm x 72cm
= 360cm
Answer: your answers are correct. I inserted an image of the answers.
If you let x = 13:
Then, Area = 2(13)^2 - 5(13)
= 338 - 65
= 273 sq ft
If you let 2x-5 = 13:
2x = 18
x = 6
Then, Area = 2(6)^2 - 5(6)
= 72 - 30
= 42 sq ft
Therefore, your options are A or C. Your answer can be chosen based on what you assume the width to be. Good luck!
