Question

If y varies jointly as x and z, and y = 20, x = 2, and z = 5, then find k, the constant of variation.

Answer 1

\[y=kxz\]Solve for k
\[k=y/(xz)\]
Plug in
\[k=20/[(2)(5)]\]\[k=2\]
So,
\[y=2xz\]

Answer 2

Thank you :)