To find the value of $f(2) + f(5)$ for the given function $f(x) = 2x - 5$, we need to calculate both $f(2)$ and $f(5)$ individually.

1. Calculate $f(2)$: $f(2) = 2(2) - 5 = 4 - 5 = -1$

2. Calculate $f(5)$: $f(5) = 2(5) - 5 = 10 - 5 = 5$

3. Now, add $f(2)$ and $f(5)$: $f(2) + f(5) = -1 + 5 = 4$

Thus, the value of $f(2) + f(5)$ is 4.

Would you like further details or clarifications on this?

Here are 5 related questions to expand on this topic:

1. What is $f(3) + f(4)$ for the same function $f(x) = 2x - 5$?
2. How would the value of $f(x)$ change if the function were $f(x) = 3x - 7$?
3. Can you find the x-value when $f(x) = 0$ for $f(x) = 2x - 5$?
4. What is the inverse of the function $f(x) = 2x - 5$?
5. How do you determine whether a function like $f(x) = 2x - 5$ is increasing or decreasing?

Tip: When working with linear functions like $f(x) = 2x - 5$, the coefficient of $x$ determines the slope (steepness) of the line.