EDGE Math 8

Simplify each expression. Express your answer without negative and zero exponents. Then click on your answer.

1.	$(- 2 a^{3} b^{4}) (3 a^{2} b^{5})$

- 6 a^{5} b^{9}

- 6 a^{6} b^{20}

- 6 a^{6} b^{9}

none of the choices

Answer: $- 6 a^{5} b^{9}$

2.	$\frac{4 x y^{3} z^{5}}{6 x y z^{2}}$

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

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

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

none of the choices

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

3.	${(\frac{5 m^{- 2} n^{4}}{2 m^{2} n^{5}})}^{2}$

\frac{25}{4 m^{2} n^{2}}

\frac{25}{4 m^{8} n^{2}}

\frac{25 m^{8}}{4 n^{2}}

none of the choices

Answer: $\frac{25}{4 m^{8} n^{2}}$

4.	$\frac{a^{5} b^{- 7} c^{10}}{3^{2} a^{6} b c^{2}}$

\frac{c^{8}}{9 a b^{8}}

\frac{a c^{8}}{9 b^{8}}

\frac{a b^{8} c^{8}}{9}

none of the choices

Answer: $\frac{c^{8}}{9 a b^{8}}$

5.	$\frac{{(4 x^{2} y^{4})}^{- 3}}{{(2 x y^{- 2})}^{2}}$

\frac{256}{x^{8} y^{8}}

\frac{1}{256 x^{8} y^{8}}

\frac{x^{8}}{256 y^{8}}

none of the choices

Answer: $\frac{1}{256 x^{8} y^{8}}$

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