The length of a rectangle is 8 inches more than twice its width. The area of the rectangle is 120 square inches. How many inches
is the length of the rectangle?
1 answer:
Answer:
L = 20 inches
Step-by-step explanation:
w = width
L = length
area = 120
W x L = 120
L - 8 = 2W then L = 2W + 8
substitute for L:
W x (2W + 8) = 120
2W² + 8W -120 = 0
(2W - 12)(W + 10) = 0
2W-12 = 0
2W = 12
W = 6
L = 20
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