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December 22, 2014

December 22, 2014

Posted by **Anthony** on Tuesday, December 11, 2007 at 11:36pm.

I know distance=(rate)(time).so I set it up like this...x=distance

X/(60)(15) + x/(40)(15)=

..but I end up getting the wrong answer...any advice on how to set up uniform motion problems dealing with ROUND TRIPS..thanks.

- algebra -
**DrBob222**, Wednesday, December 12, 2007 at 12:18amHe traveled at 60 mph a distance of 60*hours.

He traveled at 40 mph the same distance of 40(15 hrs - time hrs). The distance is the same; therefore, set them equal.

60t = 40(15-t)

60t = 600 - 40t

100t = 600

t = 6 hrs for the 60 mph day.

15-t = 9 hours for the 40 mph day.

distance = 6 h x 60 mph = 360 miles.

distance = 9 h x 40 mph = 360 miles.

Check my work. Check my thinking.

- algebra -
**Kasey**, Wednesday, December 12, 2007 at 1:25pmi do believe this guy up is right...you just need to sit down and think about it step by step dont get frustrated and give up, just keep working on it and sooner or later you will get it,

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