SOLUTION: marissa has 64 feet of fencing. she is using the fencing to border a rectangular flower garden. marissa wants the length to be 20 feet? if she uses all the fencing, what will the w

Algebra ->  Rectangles -> SOLUTION: marissa has 64 feet of fencing. she is using the fencing to border a rectangular flower garden. marissa wants the length to be 20 feet? if she uses all the fencing, what will the w      Log On


   

Question 838809: marissa has 64 feet of fencing. she is using the fencing to border a rectangular flower garden. marissa wants the length to be 20 feet? if she uses all the fencing, what will the width of the rectangular AREA be? show your work
A = L X W
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
A = L X W
Choose EITHER L or X, not both.

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