Question

Z varies directly with x^2 and inversely with y . When x=2 and y=4, z=3
What is the value of z when x =4 and y=9
A 16/3
B 24
C 2/3
D 8/3
Someone please help me

Answer 1

i think you mean: \(\large z = k {x^2 \over y}\)

so work out \(k\) from the givens, then solve....