distance question

Question

Deandre is 312 miles away from Bradley. They are traveling towards each other. If Bradley travels 9 mph faster than Deandre and they meet after 8 hours, how fast was each traveling?

Answer 1

Distance = Rate * Time

Let D = D's rate and B = B's rate

8D = D's distance and 8B = B's distance

Together they traveled 8D + 8B = 312

B = D + 9

Substitue

8D + 8(D + 9) = 312

16D + 72 = 312

16D = 240

D = 15

B = 24