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September 20, 2014

September 20, 2014

Posted by **Mary** on Sunday, April 24, 2011 at 11:47am.

- math -
**MathMate**, Sunday, April 24, 2011 at 3:17pmFrom the time it takes to do the complete joh, calculate the time it takes to do per hour. The resulting rate can then be added to find the time it takes for both of them.

1/(1/4+1/5)=1/(9/20)=20/9=2 2/9 hours.

- math -
**meme**, Tuesday, February 28, 2012 at 2:57amthe time t that it takes for a salesman to drive a certain distance d varies inversely as the average speed r . it takes the salesman 4.75 h to travel between two cities at 60 mi/h . how long would the drive take ?

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