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March 30, 2017

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Karin biked at 13 mph for a time but got a flat tire. She then walked at 5 mph. She traveled a total of 93 miles. Had she biked the whole time, she would have gone 117 miles. How many hours did she walk?

  • algebra time and distance - ,

    distance=rate*time
    117=13*time solve for time.
    Now,
    93=13*timeride+5*(timeabove-timeride)
    solve for time ride, then subtract it from the first time found.

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