EDGE Math 8

Simplify each expression. Assume that the variables represent nonzero real numbers. Then choose your answer.

1.	${(\frac{q}{r})}^{9}$

\frac{q^{9}}{r}

q^{9} r^{9}

\frac{9 q}{r}

none of the choices

Answer: none of the choices; the answer is $\frac{q^{9}}{r^{9}}$ .

2.	$\frac{2 t^{5}}{t^{13}}$

2 t^{8}

\frac{2}{t^{8}}

\frac{2 t}{t^{8}}

none of the choices

Answer: $\frac{2}{t^{8}}$

3.	$4 h^{4} h^{7}$

4 h^{11}

4 h^{3}

4 h^{28}

none of the choices

Answer: $4 h^{11}$

4.	${(- 5 k^{3})}^{2}$

25 k^{6}

- 25 k^{6}

10 k^{5}

- 10 k^{5}

Answer: $25 k^{6}$

5.	$\frac{2}{3} \cdot \frac{m^{4}}{m^{5}}$

\frac{2}{3}

\frac{2}{3 m}

\frac{2 m}{3}

none of the choices

Answer: $\frac{2}{3 m}$

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