Asked by Robert

Matt and Jena, working together, can clean the house in 9 hours. Working alone, Jena takes three times as long as Matt. How long does it take Matt to clean the house.

Answers

Answered by Steve
If Matt takes x hours, then Jena takes 3x

1/x + 1/3x = 1/9
Answered by Anonymous
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Answered by Errold
Matt=x
Jena=y
x+y=9
Jena takes three times as long as Matt
x=y(1/3)
3x=y

x+3x=9
4x=9
x=9/4
Matt=9/4 or 2.25 hours
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