Question 416130
Suppose that y varies jointly with w and x and inversely with z,
y = {{{(wx)/z}}}
:
and y = 360 when w = 8, x = 25, and z = 5.
write it as:
{{{(wxk)/z}}} = y
Find the constant of variation (k) using these values
{{{(8*25*k)/5}}} = 360
{{{(200k)/5}}} = 360
40k = 360
k = {{{40/360}}}
k ~ .11
:
 Write the equation that models the relationship.
y = {{{(.11wx)/z}}}
:
 Then find y when w = 4, x = 4, and z = 3.
y = {{{(.11*4*4)/3}}}
y = {{{1.78/3}}}
y ~ .5926