Verified Answer :

(4/7)^3=.1865

6xyz/2xz simplifies to 3y

Part a) \((\frac{4}{7} )^{3}\)

\((\frac{4}{7} )^{3} =\frac{4^{3}}{7^{3}}= \frac{64}{343}\)

therefore

the answer part a) is equal to

\(\frac{64}{343}\)

Part b) \(\frac{6xyz}{2xz}\)

\(\frac{6xyz}{2xz}= \frac{(2xz)(3y)}{2xz} = 3y\)

therefore

the answer Part b) is equal to

\(3y\)