Carmen went on a trip of 120 miles, traveling at an average of x miles per hour. Several days later she returned over the same route at a rate that was 5 miles per hour faster than her previous rate. If the time for the return trip was one-third of an hour less than the time for the outgoing trip, which equation can be used to find the value of x?
120x+5=13
x120=x+5120−13
120x+(x−5)=13
120x=120x+5+13
The correct Answer is:D
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Knowledge Check
- Question 1 - Select One
A man drove to work at an average rate of speed of 60 miles per hour and returned over the same route driving at an average rate of speed of 40 miles per hour. If his total driving time was 1 hour, what was the total number of miles in the round trip?
A12B24C30D48 - Question 1 - Select One
Steve ran a 12-mile race at an average speed of 8 miles per hour. If Adam ran the same race at an average speed of 6 miles per hour, how many minutes longer did Adam take to complete the race than did Steve?
A12B16C24D30 - Question 1 - Select One
The distance between cities A and B car travels from A to B at 60 miles per hour and returns from B to A long the same route at 40 miles per hour. What is the averge speed for the round trip?
A48B50C56D58 - Question 1 - Select One
Amy drove the 200 miles to New Orleans at at average speed 10 miles per hour faster than her usual average speed. If the complwrws the trip in 1 hour less than usual, what is her usual driving speed, in miles per hour?
A20B30C40D50 - Question 1 - Select One
A cyclist travels 20 miles at a second of 15 miles per hours. If he returns along the same path and the entire trip takes 2 hours, at what spped did he return?
A15 mphB20 mphC22 mphD30 mph - Question 1 - Select One
Tina runs at a rate of 8 miles per hour. At that rate, how many miles will she run in 12 minutes?
A58B23C112D135
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