Question

Mike and Jamal are 9 miles apart, and are planning to meet up. Mike is walking at an average speed of 3 miles per hour to meet Jamal. Jamal is driving at an average speed of 25 miles per hour to meet Mike.

Which equation can be used to find t, the time it takes for Mike and Jamal to meet?

25t – 3t = 0
25t – 3t = 9
25t + 3t = 1
25t + 3t = 9

Answer 1

25t + 3t = 9

Explanation:

Answer 2

25t + 3t = 9

Explanation:

Since they are going to each other, their speeds need to be combined, since they both contribute to reduce the distance between them.

So, 25t + 3t = 9 is the answer, because

25t is the distance Jamal will drive in an hour,

3t is the distance Mike will walk in an hour,

9 is the distance to be covered so they can meet.