When the variables are given as;
[tex]x=2,y=6,z=4[/tex]The expression;
[tex]\frac{y^3}{xz}[/tex]now becomes;
[tex]\begin{gathered} \frac{y^3}{xz}=\frac{6^3}{(2)(4)} \\ \frac{y^3}{xz}=\frac{216}{8} \\ \frac{y^3}{xz}=27 \end{gathered}[/tex]ANSWER:
The value of the given expression is 27