SOLUTION: Rate time distance Practice problem Alma started biking to the restaurant traveling 15 mph, after some time the bike got a flat so Alma walked the rest of the way, traveling 4

Algebra ->  Linear-equations -> SOLUTION: Rate time distance Practice problem Alma started biking to the restaurant traveling 15 mph, after some time the bike got a flat so Alma walked the rest of the way, traveling 4      Log On


   

Question 1175203: Rate time distance Practice problem

Alma started biking to the restaurant traveling 15 mph, after some time the bike got a flat so Alma walked the rest of the way, traveling 4 mph. If the total trip to the restaurant took 11 hours and it was 99 miles away, how long did Alma travel at each speed?




_______hours at 15 mph




_______hours at 4 mph
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D Basic Rule 

          SPEED       TIME       DISTANCE

BIKING        15          b         15b

WALKING        4        11-b       4(11-b)

TOTAL                    11         99

You see what is happening here and should be able to setup equation and solve and finish.
SETUP THE OBVIOUS EQUATION FOR THE TOTAL DISTANCE. SOLVE!