Question

Find each value if $f\left(x\right)=5x-9$

$f\left(6\right)$

Short answer

The value of $f\left(6\right)$ is 21.

Step-by-step solution

– Putting value of x

We will put 6 in place ofxto determine the value of the function.

– Simplifying the given function

As, we have:

$f\left(x\right)=5x-9$

We will put $x=6$:

$\begin{array}{l}f\left(6\right)=5\left(6\right)-9\\ f\left(6\right)=30-9\\ f\left(6\right)=21\end{array}$

– Determining the final answer 

$f\left(6\right)=21$