Chapter 8.1, Problem 18PPS

To determine

To calculate: Find the value of function $f\left(12\right)$ .

Answer to Problem 18PPS

The value of the function $f\left(12\right)$ is 27.

Explanation of Solution

Given that: Function $f\left(x\right)=3x-9$ , where $x$ is variable.

Calculation:

At the different value of $x$ we get the different value of the function.

Therefore, at $x=12$ , the value of the function $f\left(x\right)$

  $\Rightarrow f\left(12\right)=3\times 12-9$

  $\begin{array}{l}\Rightarrow f\left(12\right)=36-9\\ \Rightarrow f\left(12\right)=27\end{array}$