LISETTE G.

asked • 11/30/16

Word Problem

Mr. White can paint his barn in 5 days. What part of the barn is still unpainted after he has worked for x days?

1 Expert Answer

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Mark M. answered • 11/30/16

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In x days he paints x/5 of the barn.
That leaves 1 - x/5 to be painted.
Can you simplify?
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MIke L.

The fraction is (5-x)/5. However, this assumes he paints uniformly throughout all 5 days. All we know is that he can paint the barn in 5 days, but its possible that one half of the house takes 4 days to paint and the other half takes only 1 day, for whatever reason. So there is a lack of information to properly solve this puzzle.
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11/30/16

Mark M.

Having encountered many problems of this type in my teaching career, niformity is assumed. Calculus is the proper domain of non-linear change.
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11/30/16

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