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anonymous
 5 years ago
It takes Jake 9 hours longer than Joe to rebuild an engine. Working together, they can do the job in 20 hours. How long would it take each, working alone, to rebuild an engine?
anonymous
 5 years ago
It takes Jake 9 hours longer than Joe to rebuild an engine. Working together, they can do the job in 20 hours. How long would it take each, working alone, to rebuild an engine?

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0Jake = j+9 j + j+9 = 20

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.02j = 11 j = 11/2 = 5.5 hours .... this doesnt look likeits gonna work out lke i thought lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0let jack do in a hr. and joe in a+9 hr. in one hr both they do 1/a+1/(a+9). so 20(1/a +1/(a+9))=1 will give you a.

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0ahhh.... i didnt do reciprocals lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0darn cuz i had the same answer as amistre....so what the answer if that doesnt work out?
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