Simplify the expression. Write the answer with positive exponents onl Assume the variable represents a nonzero real number. $$ 9 z^{-1}=\square $$

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To simplify the expression $$ 9 z^{-1} $$ with only positive exponents, follow these steps:

1. **Understand Negative Exponents:**
   A negative exponent means the reciprocal of the base raised to the positive exponent. Specifically:
   $$
   z^{-1} = \frac{1}{z}
   $$

2. **Apply the Negative Exponent:**
   Substitute $$ z^{-1} $$ with $$ \frac{1}{z} $$:
   $$
   9 z^{-1} = 9 \times \frac{1}{z}
   $$

3. **Simplify the Expression:**
   Multiply the constants to get the final simplified form:
   $$
   9 z^{-1} = \frac{9}{z}
   $$

So, the simplified expression with only positive exponents is:

$$
\boxed{\dfrac{9}{z}}
$$
$$ \frac{9}{z} $$

Simplify the expression. Write the answer with positive exponents onl Assume the variable represents a nonzero real number. \[ 9 z^{-1}=\square \]

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