Bunuel wrote:
If it takes Jacob x hours to complete a project and it takes Mike y hours to complete the same project, how many hours will it take them to complete the project if they are working together?
A. xy/(x+y)
B. (x+y)/(xy)
C. x+y
D. xy
E. x–y
\(\frac{1}{x} + \frac{1}{y} = \frac{1}{z}\)
\(z = \frac{xy}{(x+y)}\)
Answer: A
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