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inessss [21]
3 years ago
9

The length of a rectangular picture frame is 7 inches less than twice its width. The area is 60 square inches. What is the lengt

h of the frame?
Mathematics
1 answer:
lapo4ka [179]3 years ago
4 0

L=2w-7 and A=Lw, therefore:

(2w-7)(w)=60

2w^2 -7w=60

2w^2-7w-60=0

(w+4)(2w-15)=0 Only solve where w is positive.

2w-15=0

w=7.5

L=8

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