SOLUTION: The perimeter of a small rectangular house is 120 yards. Carrie wrote a function B(l) that represents the area of the house with length l. Find her mistake, explain where she went

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Question 1010114: The perimeter of a small rectangular house is 120 yards. Carrie wrote a function B(l) that represents the area of the house with length l. Find her mistake, explain where she went wrong, and correct her mistakes.
2l+2w=120
w=120-2l
A=lw
B(l)=l(120-2l)
B(l)=120l-21^2
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
Response already given. Choose a better variable for LENGTH.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+2L+%2B+2W+=+120+ ( OK so far )
+2W+=+120+-+2L+
+W+=+60+-+L+ ( she got this wrong )