Homework Help: college algebra

Posted by karen on Friday, November 21, 2008 at 4:23pm.

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 - drwls, Friday, November 21, 2008 at 4:32pm
Vk = Vj + 5
Vk/Vj = 63/49 = 9/7
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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 - karen, Friday, November 21, 2008 at 4:50pm
  awesome. thanks I was trying to do r=d/t and wasn't getting it right.
college algebra - Tammy, Sunday, February 20, 2011 at 2:41pm
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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