can any one help? linear equation?

Question

Martina leaves home at 9 A.M., bicycling at a rate of
24 mi/h. Two hours later, John leaves, driving at the rate of 48 mi/h. At what time
will John catch up with Martina?

Answer 1

In two hours Martina goes 48 miles. Her distance from the house for times after that is:
Distance = 48 + 24T

John drives at 48 mi/h so:
Distance = 48T

Set these two equal to each other:
48 + 24T = 48T
48 = 24T
T = 2 hours
So it takes John 2 hours to catch up to Martina so the total time Martina has been gone is 2+2 or 4 hours. So the time is 9 AM + 4 hours or 1 PM.

Answer 2

Hours*24 = (Hours-2)*48

Hours*(1/2) = Hours - 2
Hours = 4.

Two hours for John; Martina will have been biking for 4 hours.

Answer 3

12:30 pm

Answer 4

3P.M