91Ó°ÊÓ

In the following exercises, simplify each expression.

$\frac{9-3·9}{15-9}$

In the following exercises, simplify each expression.

$\frac{4\left(-3+2\left(3-6\right)\right)}{3\left(11-3\left(2+3\right)\right)}$

In the following exercises, simplify each expression.

$\frac{5}{13}·45·\frac{13}{5}$

In the following exercises, simplify each expression.

$\frac{-{\displaystyle \frac{5}{9}}}{{\displaystyle \frac{10}{21}}}$

In the following exercises, simplify each expression.

$-4.8+(-6.7)$

In the following exercises, simplify each expression.

$34.6-100$

In the following exercises, simplify each expression.

$-12.04·\left(4.2\right)$

In the following exercises, simplify each expression.

$-8÷0.05$

In the following exercises, translate the phrases into algebraic expressions.

(a) five times the sum of 3xand y

(b) the sum of five times 3x and y

In the following exercises, simplify each expression :$\sqrt{-121}$