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college algebra

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Kathy bicycles 5km/h faster than Javier. In the same time it takes Javier to bicycle 49km, Kathy can bicycle 63 km. How fast does each bicyclist travel?

  • college algebra - ,

    Vk = Vj + 5
    Vk/Vj = 63/49 = 9/7
    ------------------
    Vj = (7/9)Vk
    Vk = (7/9)Vk + 5
    (2/9)Vk = 5
    Vk = 22.5 km/h
    Vj = 17.5 km/h

  • college algebra - ,

    awesome. thanks I was trying to do r=d/t and wasn't getting it right.

  • college algebra - ,

    Kathy bicycles 8 km/h faster than Chris. In the same time it takes Chris to bicycle 57 km, Kathy can bicycle 81 km. How fast does bicylist go?

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