Chapter 8.7, Problem 3E

To determine

To find:

The value of $f(x)$ , when $x=-8$ .

Answer to Problem 3E

Thevalue of $f(x)$ , when $x=-8$ would be $-52$ .

Explanation of Solution

Given:

A function: $f(x)=7x+4$

Calculation:

To find the value of $f(x)$ , when $x=-8$ , we will substitute $x=-8$ in our given function as shown below:

  $\begin{array}{l}f(x)=7x+4\left(\text{Given function}\right)\\ f(-8)=7(-8)+4\left(\text{Substituting }x=-8\right)\\ f(-8)=-56+4\\ f(-8)=-52\end{array}$

Therefore, thevalue of $f(x)$ , when $x=-8$ would be $-52$ .