SOLUTION: The length of a rectangular sign is 4 feet longer than the width. If the sign's area is 480 square feet, find its length and width.
Thank you!!!!!!
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Thank you!!!!!!
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Question 1109934: The length of a rectangular sign is 4 feet longer than the width. If the sign's area is 480 square feet, find its length and width.
Thank you!!!!!! Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! let l be the length and w be the width
:
l = w + 4
:
l * w = 480
:
(w+4) * w = 480
:
w^2 +4w -480 = 0
:
(w+24) * (w-20) = 0
:
w = -24 and w = 20
:
we reject the negative value for w
:
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length = 24 feet and width = 20 feet
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