Homework Help: math

Posted by Becky on Sunday, November 16, 2008 at 8:53pm.

I have trouble solving word problems. Can you help me solve this problem?

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together?

math - Ms. Sue, Sunday, November 16, 2008 at 8:59pm
Bobpursley already answered your question.

http://www.jiskha.com/display.cgi?id=1226828150
- math - Becky, Sunday, November 16, 2008 at 9:04pm
  How did you get 10/24 then 24/10?
math - bobpursley, Sunday, November 16, 2008 at 9:09pm
Remember: when dividing fractions, it is the same as multiplying by the inverse.

s/(b/c)= ca/b

so
1/(10/24)= 24/10
- math - Becky, Sunday, November 16, 2008 at 9:19pm
  How did you get 10/24? Are you adding the fractions by useing the lease common denominator?
  - math - Ms. Sue, Sunday, November 16, 2008 at 9:30pm
    Yes.

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