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Home > MC2 > Chapter 7 > Lesson 7.2.2 > Problem 7-77


Pierre was walking toward school at a rate of two miles per hour. He started six miles from school. Dom left school and walked toward Pierre at a rate of four miles per hour. When and how far from school will the boys pass each other?

Drawing a picture may be helpful.
Try and write an expression to represent these actions.

Notice that Pierre and Dom must walk a combined total of miles.

To find the amount of miles one person walks, you must multiply the rate by the time.
Let represent the amount of time the two will have walked when they pass each other.

Since the two must walk a total of miles:

At 1 hour, how many miles will Pierre have walked?
How far will he be from school?