SOLUTION: Two buses leave Houston at the same time and travel in oppisite direction. One bus averages 55 mi/h and the other bus averages 45 mi/h. When will they be 400 mi apart?

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Question 94097This question is from textbook prentice hall mathematics algebra 2
: Two buses leave Houston at the same time and travel in oppisite direction. One bus averages 55 mi/h and the other bus averages 45 mi/h. When will they be 400 mi apart? This question is from textbook prentice hall mathematics algebra 2

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
55T+45T=400
100T=400
T=400/100
T=4 HOURS.
PROOF
55*4+45*4=400
220+180=400
400=400