Suppose that y varies directly with w and square of x and inversely with z, and y=25 when w=5, x=5, and z=10. Find y when w=4, x=5, and z=50.

Question

For the given values, y=

Answer 1

y=(k*w*x^2)/z

25=(k*5*5^2)/10

25*10=k*5*25

250=k*125

k=250/125

k=2

y=(2*4*5^2)/50

y=200/50

y=4