91Ó°ÊÓ

Evaluate each expression without using a calculator. $$ (-8)^{-1 / 3} $$

Evaluate each expression without using a calculator. $$ (-27)^{-1 / 3} $$

Identify each function as a polynomial, a rational function, an exponential function, a piecewise linear function, or none of these. (Do not graph them; just identify their types.) $$ f(x)=x^{2}+9 $$

Solve each equation by factoring or the Quadratic Formula, as appropriate. $$ 3 x^{2}+18=15 x $$

Write an equation of the line satisfying the following conditions. If possible, write your answer in the form \(y=m x+b\). Vertical and passing through the point \(\left(\frac{1}{2}, \frac{3}{4}\right)\)

Write an equation of the line satisfying the following conditions. If possible, write your answer in the form \(y=m x+b\). Passing through the points \((5,3)\) and \((7,-1)\)

Solve each equation by factoring or the Quadratic Formula, as appropriate. $$ 5 x^{2}-50 x=0 $$

Identify each function as a polynomial, a rational function, an exponential function, a piecewise linear function, or none of these. (Do not graph them; just identify their types.) $$ f(x)=\left\\{\begin{array}{ll} x-2 & \text { if } x<3 \\ 7-4 x & \text { if } x \geq 3 \end{array}\right. $$

Evaluate each expression without using a calculator. $$ (-8)^{-2 / 3} $$

Identify each function as a polynomial, a rational function, an exponential function, a piecewise linear function, or none of these. (Do not graph them; just identify their types.) $$ f(x)=\frac{x}{x^{2}+9} $$