Precalculus Examples

$g (x) = - \frac{1}{2} x + 9$ , $g (- 8)$

Step 1

Replace the variable $x$ with $- 8$ in the expression.

$g (- 8) = - \frac{1}{2} \cdot - 8 + 9$

Step 2

Simplify $- \frac{1}{2} \cdot - 8 + 9$ .

Tap for more steps...

Step 2.1

Remove parentheses.

$- \frac{1}{2} \cdot - 8 + 9$

Step 2.2

Simplify each term.

Tap for more steps...

Step 2.2.1

Cancel the common factor of $2$ .

Tap for more steps...

Step 2.2.1.1

Move the leading negative in $- \frac{1}{2}$ into the numerator.

$\frac{- 1}{2} \cdot - 8 + 9$

Step 2.2.1.2

Factor $2$ out of $- 8$ .

$\frac{- 1}{2} \cdot (2 (- 4)) + 9$

Step 2.2.1.3

Cancel the common factor.

$\frac{- 1}{2} \cdot (2 \cdot - 4) + 9$

Step 2.2.1.4

Rewrite the expression.

$- 1 \cdot - 4 + 9$

Step 2.2.2

Multiply $- 1$ by $- 4$ .

$4 + 9$

Step 2.3

Add $4$ and $9$ .

$13$