Posted by Shannon on .
Alice travels 6 times faster than Bill. Traveling in opposite directions, they are 714 miles apart after 6 hours. Find their rates of travel.

Algebra 
Reiny,
bill's speed  x mph
Alice's speed  6x mph
After 5 hrs.
bill has gone 5x
Alice has gone 30x
5x+30x=714
x = 20.4
Bill went at 20.4 mph
Alice went at 122.4 mph