Question

NEED HELP PLEASE ASAP!!!!!!!!!!!!!!

George is building a fence around a rectangular dog run. He is using his house as one side of the run. The area of the dog run will be 240 square feet. The length of the run is 30 feet, and the width is(30-x) feet. The diagram below shows his plan.

Recall the formulas for area and perimeter: A = lw and P = 2l + 2w.



How many feet of fencing will George need for the dog run?
22 feet
68 feet
76 feet
82 feet

Answer 1

your answer would be B, 68 feet.

Hope this helps. :D

Explanation:

Answer 2

So you know that 30 + 30 + w + w = P. We also know the area is 240 square feet. Divide 240 by 30 to find the width of the area. 240 / 30 = 8. w = 8. So add 30 + 30 + 8 + 8 to find that P = 76. HOWEVER, remember that George is using part of his house as a wall instead of a fence. So subtract 8 from 76 to get 68 ft. George will need 68 ft. of fencing for his dog run.