To find $f(4)$ for the function $F(x) = 5 - 3x$, follow these steps:

1. Substitute $x = 4$ into the function $F(x)$.

   $F(4) = 5 - 3 \cdot 4$

2. Calculate the value:

   $F(4) = 5 - 12$

3. Simplify the result:

   $F(4) = -7$

Therefore, $f(4) = -7$.

Would you like more details or have any questions?

Here are some related questions for further practice:

1. Find $F(2)$ for $F(x) = 5 - 3x$.
2. Determine the value of $F(-1)$.
3. What is $F(0)$?
4. Find $F(x)$ when $x = -3$.
5. Determine the inverse of the function $F(x) = 5 - 3x$.
6. What is the slope of the function $F(x) = 5 - 3x$?
7. If $F(x) = y$, express $x$ in terms of $y$.
8. How does the graph of $F(x) = 5 - 3x$ look like?

Tip: When finding the value of a function at a specific point, always remember to substitute the given value for the variable in the function's equation.