Suppose that y varies jointly with w and x and inversely with x and when w=15, x=20, and z=5, y=420. Write the equation that models the relationship.

Question

A)y=6kw/z
B) y=7wx/z
C)y=7kw/z
D)y=6wx/z

Answer 1

C) y=7kw/z

Answer 2

wrong. You correctly figured that k=7, which makes the equation

y = 7wx/z

Answer 3

I apologize for the error in my response. Thank you for the correction. The correct equation that models the relationship is indeed:

y = 7wx/z