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a rectangular yard has area 96 square feet. if the width of the yard is 4 feet less than the length, what is the perimeter, in feet, of the yard?

i don’t know how to work it

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David W. | I'll help you understand math!I'll help you understand math!
4.9 4.9 (63 lesson ratings) (63)
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P = 2(l + w)
A = lw
w = l - 4
 
l(l - 4) = 96
l- 4l - 96 = 0
(l + 8)(l - 12) = 0
 
l + 8 = 0
l = -8
Because we don't measure using negatives, we disregard this answer.
 
l - 12 = 0
l = 12
 
w = 12 - 4
w = 8
 
P = 2(12 + 8)
P = 2(20)
P = 40 ft