PLEASEE HELP! MEDALS GIVIN
Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at 85 miles per hour. The eastbound train travels at 65 miles per hour. How long will it take for the two trains to be 240 miles apart?

Question

PLEASEE HELP! MEDALS GIVIN
Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at 85 miles per hour. The eastbound train travels at 65 miles per hour. How long will it take for the two trains to be 240 miles apart?

perl · Answer

we can model this with algebraic equations

perl · Answer

eastbound train: x1(t) = 65*t
westbound train  :  x2(t) = -85*t

distance between them is  x1(t) - x2(t) =  65*t - (-85*t) = 150*t

anonymous · Answer

Two cars leave towns 
450
 kilometers apart at the same time and travel toward each other. One car's rate is 
16
 kilometers per hour less than the other's. If they meet in 
3
 hours, what is the rate of the slower car?