Question

10x^3 y^-5 z^-2 if x=3 y=2 and z=5 express your answer as a reduced fraction

Answer 1

`\large\boxed{(27)/(80)}`

Explanation:

Put x = 3, y = 2 and z = 5 to the given expression
`10x^3y^(-5)z^(-2)`:

`10(3^3)(2^(-5))(5^(-2))\qquad\text{use}\ a^(-n)=(1)/(a^n)\\\\=(10(27))/((2^5)(5^2))=(270)/((32)(25))=(270)/(800)=(27)/(80)`