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 2 years ago
It takes Tom 15 minutes to wash a car.It takes only 10 minutes with jerry helping.how long should it take jerry to wash the car by himself?
A. 6 minutes
b. 12.5 minutes
c. none of these choices are correct.
d. 25 minutes
e. 5 minutes
 2 years ago
It takes Tom 15 minutes to wash a car.It takes only 10 minutes with jerry helping.how long should it take jerry to wash the car by himself? A. 6 minutes b. 12.5 minutes c. none of these choices are correct. d. 25 minutes e. 5 minutes

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kumar2006
 2 years ago
Best ResponseYou've already chosen the best response.2would take 30 minutes

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.0Tom can wash 1/15 of the car in 1 minute Together they wash 1/10 of the car in 1 minutes. The part Tom does + the part Jerry does = the part they do together. So \[\frac{1}{15}+\frac{1}{x}=\frac{1}{10}\]

ryman
 2 years ago
Best ResponseYou've already chosen the best response.1can you solve that iheart?

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.0Multiply each term by the common denominator which is 30x

ryman
 2 years ago
Best ResponseYou've already chosen the best response.1ok  first find LCM of 10,15 and x this is 30x multiply each term by 30x gives 30x 30x 30x  +  =  15 x 10 dividing each term 2x + 30 = 3x 30 = 3x  2x = x so x = 30 none of the choices are correct  as kumar said the answer is c
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