0. Review of Algebra

Rationalize the denominator. 

$-\frac{5}{2\sqrt7}$

Rationalize the denominator. $\frac{6+\sqrt{x}}{-\sqrt{x}}$

Rationalize the denominator and simplify the radical expression.

$\frac{2-\sqrt3}{2+\sqrt3}$

Rationalize the denominator and simplify the radical expression.

$\frac{\sqrt7}{5-\sqrt6}$

Rationalize the denominator.

$\frac{1}{\sqrt7}$

Rationalize the denominator.

$\frac{\sqrt{2}}{\sqrt{5}}$

Rationalize the denominator.

$\frac{3}{3+\sqrt7}$

Rationalize the denominator.

$\frac{5}{\sqrt3-1}$