Question 104339
Since Terry has already walked 3 of the 13 miles, you know that he has (13-3) miles to go.
Remember that: d = rt or distance = rate(speed) multiplied by time.
You can write this as:
t = d/r and in this problem, r = 4 mph and d = (13-3), so you can write the equation:
t = (13-3)miles/4mph This will tell you how long, in hours, it will take Terry to cover the remaining miles.