8. Rational Expressions and Functions

Is the following a rational expression or equation?

$\frac{17x+1}{21x-2}$

Is the following a rational expression or equation?

$\frac{3m}{m^2-9}=\frac{11}{2x+13}$

Solve the following.

$-\frac{3n}{n+2}+\frac{2n}{4n+8}=\frac{6}{8n+16}$

Solve the following.

$\frac{p^2}{p-4}+\frac{4}{4-p}=1$