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algebra

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Marlene rides her bycicle to her friend Jon's house and returns home by the same route. Marlene rides her bike at constant speeds of 6mph on level grond, 4mph when going uphill and 12mph when going downhill. If her total riding time was 2 hours, how far was John's house? (note: Marlene does travel uphill, downhill, and on even ground)

  • algebra -

    car travels 20 mins., bike travels 45mins. the same distance. Car goes 4.5 mph faster than bike. How far is the distance of travel?

  • algebra -

    4.5

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