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Orlov [11]
3 years ago
7

a rectangular retaining wall has an area of 15 square feet. the height of the wall is two feet lesss than its length. find the h

eight and the length of the wall.
Mathematics
1 answer:
ivolga24 [154]3 years ago
8 0
X(x-2)=15
x^2 - 2x = 15
x^2 - 2x - 15 = 0
(x-5)(x+3)=0
x-5=0 x+3=0
x=5 x=-3

The length is 5 because -3 cannot be the answer as it is negative. The height of the wall is 3 because 5-2 is 3.
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