joint and combined variation

ibueno1

New member
Joined
Apr 4, 2006
Messages
18
i really need help on this problem you are supposed to solve

a varies jointly as b and c and inversely as d.one set of values is a=0.525, b=6,c=7, and d=8.find a when b=12,c=7 and d=3

i would really appreciate your help :D
 
The general formula is
a=k(bc/d)
Use the given set of values to find k then plug in the "question" values.
 
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