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Beth had planned to run an average of 6 miles per hour in a race. She had a very good race and actually ran at an average speed of 7 miles per hour, finishing 10 minutes sooner that she would have if she had averaged 6 mph. How long was the race?
 one year ago
 one year ago
Beth had planned to run an average of 6 miles per hour in a race. She had a very good race and actually ran at an average speed of 7 miles per hour, finishing 10 minutes sooner that she would have if she had averaged 6 mph. How long was the race?
 one year ago
 one year ago

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ganeshie8Best ResponseYou've already chosen the best response.1
if t is her normal time for 6 mph speed, 6t = 7(t10) you can solve for t...
 one year ago
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