Question

Marissa has 64 feet of fencing. She is using the fencing to border a rectangular flower garden. Marissa wants the length of the garden to be 20 feet. If she uses all of the fencing, what will be the width of the rectangular garden? 7 feet 20 feet a. To solve the problem, do you use perimeter or area? Explain how you know.​

Answer 1

240

Explanation:

Assign Variables:

(I will choose mine a little bit differently)

d = length of garden

d = 20 feet

w = width of garden

A = area of garden

Equations and Solution:

A=d%2Aw and perimeter given as 64 feet means 2d%2B2w=64.

We know what is the d value, so we want to solve for w.

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2w=64-2d

w=32-d

w=32-20

highlight%28w=12%29 feet

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FINDING AREA VALUE

A=d%2Aw

A=20%2A12

highlight%28A=240%29 square feet