Question

Carlos and Maria drove a total of 191 miles in 3.8 hours. Carlos drove the first part of the trip and averaged 49 miles per hour. Maria drove the remainder of the trip and averaged 52 miles per hour. For approximately how many hours did Maria drive? Round your answer to the nearest tenth if necessary.

Answer 1

First of all, represent the number of hours that Carlos drove by c and the number of hours that that Maria drove by m. If you add together c and m, what do you get? In this problem we're not interested in c; we ARE interested in m.