It takes Gregory 50 minutes to get to his best friends
house. He spends m minutes riding his bike to the bus
stop at a rate of 0.25 miles per minute. He gets on the bus
and travels the rest of the way at a rate of 0.6 miles per
minute. The total distance traveled is represented by the
expression 0.25m + 0.6(50 - m).
a. Explain what (50 – m) represents in this situation.
b. Simplify this expression.
c. Gregory rides his bike for 10 minutes. How many
miles did he ride?