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frankyecorona
frankyecorona frankyecorona
  • 22-02-2017
  • Mathematics
Answered

The length of a rectangle is 4 units less than twice the width. What is the length if the area of the rectangle is 160 square units?


Enter your answer as a number, like this: 42


Do not enter any units.

Verified Answer :

wolf1728
wolf1728 wolf1728
  • 27-02-2017
AL = (2W) -4
B) LW = 160
B) L = 160/W
Substituting that into A)
160/W = (2*W) -4
160 = 2W^2 -4W
2W^2 -4W-160 = 0
Width = 10
Length = 16

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