# 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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