To find $f(5)$, we will substitute $x = 5$ into the given function:

$f(x) = 5 + 2x$

Substitute $x = 5$:

$f(5) = 5 + 2(5)$

$f(5) = 5 + 10 = 15$

So, $f(5) = 15$.

Would you like further clarification, or do you have any additional questions?

Here are 5 related questions you might find useful:

1. What is $f(0)$ using the same function rule?
2. How would you graph the function $f(x) = 5 + 2x$?
3. What is the slope of the function $f(x) = 5 + 2x$?
4. How would you find $x$ if $f(x) = 25$?
5. What