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Mathematics 18 Online
OpenStudy (anonymous):

Marlene rides her bike to her friend Jon's house and returns home by the same route. Marlene rides her bike at constant speeds of 6 mph on level ground, 4 mph going uphill, and 12 mph going downhill. If her total time was 1 hr, how far is it to Jon's house?

OpenStudy (anonymous):

below the problem is a picture of a trapezoid.

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