91Ó°ÊÓ

Simplify each square root.

$\sqrt{\frac{25}{324}}$

Example 3 Determine whether each relation is a function.

$y=3x−2$

Evaluate each expression using properties of numbers. Name the property used in each step.

$2·\frac{1}{2}+4\left(4·2-7\right)$

The simplified form of $72.5-\left(-81.3\right)$.

PET STORE In a pet store, 15% of the animals are hamsters. If the store has 40 animals, how many of them are hamsters?

Simplify each expression. If not possible, write simplified.

$\mathbf{7}\mathit{m}\mathbf{+}\mathbf{7}\mathbf{-}\mathbf{5}\mathit{m}$

Find each product or quotient. Write in the simplest form.

$\frac{4}{5}÷\frac{1}{5}$

Evaluate each expression if $g=2$, $r=3$and $t=11$.

$7−gr$

Find the following quotient.

$\frac{2}{3}÷\frac{1}{3}$

Write a verbal expression for each algebraic expression.

$25+6x^2$