Q.2 - Precalculus Enhanced with Graphing Utilities

Question

The value of the function $f\left(x\right)=3x-7$ at 5 is ________.

Step-by-Step Solution

Answer

The value of the function $f\left(x\right)=3x-7$at 5 is $8.$

Given information

Consider the function $f\left(x\right)=3x-7$.

The main objective is to find the value of$f\left(x\right)=3x-7$ at $x=5$.

Evaluate

Substitute 5 for $x$ in $f\left(x\right)=3x-7$.

$\begin{array}{rcl}f\left(5\right)& =& 3\left(5\right)-7\\ & =& 15-7\\ & =& 8\end{array}$

The value of $f\left(x\right)=3x-7$ at 5 is 8.