Question

Mary and John are 128 miles apart. A car leaves Mary traveling towards John and another car leaves John at the same time traveling towards Mary. The car leaving Mary averages 10 miles per hour more than the other car and they meet after 1 hour and 36 minutes. What are the average speeds of the cars?
since distance = speed * time,
(x + x+10)(1.6) = 128
2x+10 = 80
x = 35

So, Mary's car goes 35 mi/hr, and
John's car goes 45 mi/hr

Related Questions

Jim and Mary jog 12 miles a week. Is it reasonable to say that the jog 624 miles in a year. Estimate... mary jogged 5 7/10 miles on monday and 4 1/8 miles on tuesday. Raul jogged 6 1/2 miles on monday and... john saved 8/5 of what Mary saved. If Mary saved P 390.00 less than what John saved, how much did b... Mary starts at a point 26 miles from school and runs toward school at 6mph. Randy starts from school... Mary drives 20 miles per hour and it takes 50 minutes to reach her destination. How much time would... Mary ran 4 miles in 37 minutes. If she continued at the same pace, how long would it take her to run... John said Mary could know about the error is she calculated the standard error of the mean and the c... Mary travelled 70 miles/hour due north. This is an example of Responses A acceleration.accele... Mary ran 2 miles in 23 minutes at the same place how long will it take for 10 miles If Mary is twice as old as John, and John is 10 years old, how old is Mary? 10 15 20 25