anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
would take 30 minutes
anonymous
  • anonymous
c
saifoo.khan
  • saifoo.khan
How'd you got it?

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More answers

saifoo.khan
  • saifoo.khan
1/15 + 1/x = 1/10
anonymous
  • anonymous
1/15 + 1/x = 1/10
Mertsj
  • Mertsj
Tom 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 \[\frac{1}{15}+\frac{1}{x}=\frac{1}{10}\]
anonymous
  • anonymous
can you solve that iheart?
anonymous
  • anonymous
no sir i can not
Mertsj
  • Mertsj
Multiply each term by the common denominator which is 30x
anonymous
  • anonymous
ok - 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
anonymous
  • anonymous
thank very kind
anonymous
  • anonymous
:)
anonymous
  • anonymous
yw

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