SOLUTION: Tom traveled 280 miles east of St. Louis. For most of the trip he averaged 60mph, but for one period of time he was slowed to 10mph due to a major accident. If the total time of tr

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Tom traveled 280 miles east of St. Louis. For most of the trip he averaged 60mph, but for one period of time he was slowed to 10mph due to a major accident. If the total time of tr      Log On


   

Question 251311: Tom traveled 280 miles east of St. Louis. For most of the trip he averaged 60mph, but for one period of time he was slowed to 10mph due to a major accident. If the total time of travel was 8 hours, how many miles did he drive at the reduced speed?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
r1*t1+r2*t2=d
60*(8-t)+10*(t)=280
t= time at 10mph
so after solving for t,10*t to get miles.