brooke020500 brooke020500

02-05-2017
Mathematics

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The length of a rectangular field is 20 less than its width. The area of the field is 12,00 square feet. What is the width of the field?

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jwright24 jwright24

02-05-2017

x(x-20)=12000
x^2 - 20x = 12000
x^2 - 20x - 12000 = 0
(x - 120)(x + 100) = 0

x = -100, 120

so the width is 120 ft

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