Question

Don started driving east at 6a.m. at a rate of 75 miles per hour. If Dennis leaves the same place heading east at 8 a.m. at a rate of 80 miles per hour, how long will it take him to catch up?

Answer 1

how far don gone when dennis first starts?

Answer 2

in 2 hours that would be 150 and then dennis starts

Answer 3

r t = d
Solve the following for t:\[75(t+2)\text{ = }80t \]

Answer 4

t = 30 hours