EDGE Math 8

Perform the indicated operations and simplify the resulting expression. Choose the correct answer.

1.	$\frac{3 b^{2}}{7 b} \cdot \frac{2}{9 b^{4}}$

\frac{2}{21 b^{3}}

\frac{2 b^{2}}{16}

\frac{2}{21 b^{2}}

none of the choices

Answer: $\frac{2}{21 b^{3}}$

2.	$\frac{2 y}{8} \cdot \frac{6 y^{3}}{10 y^{2}}$

\frac{y^{2}}{5}

\frac{3 y^{2}}{20}

\frac{y}{5}

none of the choices

Answer: $\frac{3 y^{2}}{20}$

3.	$\frac{x^{2} + 4 x + 4}{x + 3} \cdot \frac{4 x + 12}{x + 2}$

4 x + 8

4 x + 2

4 x + 12

none of the choices

Answer: $4 x + 8$

4.	$\frac{x^{2} - 4}{x - 1} \cdot \frac{x - 1}{x - 2}$

x + 2

x - 1

x + 1

none of the choices

Answer: $x + 2$

5.	$\frac{x^{2} - 36}{x^{2} - 4} \cdot \frac{5 x - 10}{x^{2} - 5 x - 6}$

\frac{5 x + 6}{x^{2} + 3 x + 2}

\frac{5 x + 30}{x^{2} + 3 x + 2}

\frac{5 x - 10}{x^{2} + 3 x + 2}

none of the choices

Answer: $\frac{5 x + 30}{x^{2} + 3 x + 2}$

/ 5