SOLUTION: an athlete runs at 9 mph and then at 12 mph, covering 10 miles in one hour. how long does the athlete run at each speed? using the substitution method.
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-> SOLUTION: an athlete runs at 9 mph and then at 12 mph, covering 10 miles in one hour. how long does the athlete run at each speed? using the substitution method.
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Question 949251: an athlete runs at 9 mph and then at 12 mph, covering 10 miles in one hour. how long does the athlete run at each speed? using the substitution method. Answer by Fombitz(32388) (Show Source):
You can put this solution on YOUR website! Rate x Time= Distance
So then,
Substituting into the first equation,
So then,
2/3 hr(40 min) at 9 mph and 1/3 hr(20 min) at 12 mph
