SOLUTION: Melanie can paint a certain barn by herself in x days. Her helper Melissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn t

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Question 177414: Melanie can paint a certain barn by herself in x days. Her helper Melissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn that they complete in one day by working together. Evaluate the expression for x = 5.
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
melanie can paint 1/x of the barn per day
melissa can paint 1/2x of the barn per day
:
together they can do
:
a)%281%2Fx%29%2B%281%2F2x%29per day
:
%282%2F2x%29%2B%281%2F2x%29=3%2F2xper day
:
b)3%2F2%285%29=3%2F10