SOLUTION: the perimeter of a rectangle is 38 inches and its area is 70 square inches. find the length and width using one variable

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Question 1146930: the perimeter of a rectangle is 38 inches and its area is 70 square inches. find the length and width using one variable
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
w for width
19-w for length
w%2819-w%29=70

19w-w%5E2-70=0
-19w%2Bw%5E2%2B70=0
w%5E2-19w%2B70=0
w=%2819%2B-+sqrt%2819%5E2-4%2A70%29%29%2F2
w=%2819%2B-+9%29%2F2
system%28w=5%2C+or%2C+w=14%29

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length, 14
width, 5
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