Question 292239
Suppose that "Y" varies jointly with "W" and "X" and inversely with "z" and "y=36", when "w=3", "x=18" and "z=6". Write the equation that models the relationship. Then find when w=3, x=2, and z=4. 
:
y = {{{(kwx)/z}}}
:
"y=36", when "w=3", "x=18" and "z=6". 
Find k
{{{(k*3*18)/6}}} = 36
:
{{{(54k)/6}}} = 36
:
9k = 36
k = {{{36/9}}}
k = 4
then
y = {{{(4wx)/z}}}; is the equation
;
Then find when w=3, x=2, and z=4.
y = {{{(4wx)/z}}} 
y = {{{(4*3*2)/4}}}
y = {{{24/4}}}
y = 6