Question 857894: A rectangle is four inches longer than it is wide. Its area is 30 square inches. What are the length and width of the rectangle?
Answer by JulietG(1812)   (Show Source):
You can put this solution on YOUR website! Rarely does a teacher ask a question where the sides of a rectangle come out to decimals.
L * W = Area
Typically the sides would be the factors of 30.
30,1
15,2
10,3
6,5
None of those fit with the L = W+4 information. Would you double-check your posting?
Otherwise, what we have is:
L * W = 30
L = W + 4
(W + 4) * W = 30
W^2 + 4W = 30
W≈3.830951894845
.
Can you see why I think one of the question's numbers must be wrong? :-)
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