bramdonquestionable
bramdonquestionable bramdonquestionable
  • 19-04-2017
  • Mathematics
contestada

Terry can run 15 miles in the same amount of time it takes Mark to run 21 miles. If Mark runs 2 mph faster than Terry, How fast does Mark run?

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taskmasters
taskmasters taskmasters
  • 02-05-2017
The amount of time required to travel a certain distance is equal to quotient of distance and speed. We let x be the speed of Terry and Mark's will be x+2. The equation that would best represent the scenario is,
                             15/x = 21/(x+2)
The value of x is 5. Thus, Mark's speed is 7 mph. 
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