Homework Help: math

Posted by jack on Tuesday, May 24, 2011 at 8:11pm.

Two trains leave a train station at the same time. One travels east at 10 miles per hour. The other train travels west at 9 miles per hour. In how many hours will the two trains be 85.5 miles apart

math - Reiny, Tuesday, May 24, 2011 at 8:57pm
let the time be t hours
so 10t + 9t = 85.5

I will let you finish it.
math - Patricia, Monday, June 6, 2011 at 6:11pm
4.5 hours

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