SOLUTION: efren leaves home at 9 am and walks 4 miles per hour. his brother, Gregory leaves half an hour later and runs 8.5 miles per hour in the same direction. predict the time at which Gr

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: efren leaves home at 9 am and walks 4 miles per hour. his brother, Gregory leaves half an hour later and runs 8.5 miles per hour in the same direction. predict the time at which Gr      Log On