Question 753778
y varies directly as x and inversely as the 
square of z
y = kx/z^2
(k is the constant of proportionality)
Using the given values find out k's value

y = kx/z^2
38 = k *32/ 4^2
38 = 32k/16
38 = 2k
k = 19
Put back in formula

y = 19x/z^2

y = 19*75/5^2
y = 1425/25
y = 57
Hope this helps
:-)