Let's solve the first question together:

We are given the function $f(x) = 3x + 2$ and asked to find $f(4)$.

Step-by-Step Solution:

1. Substitute $x = 4$ into the function: $f(4) = 3(4) + 2$

2. Perform the calculation: $f(4) = 12 + 2 = 14$

Thus, the value of $f(4)$ is 14.

Now, for the second question:

We are given the function $g(x) = 4x - 3$ and asked to find $g(7)$.

Step-by-Step Solution:

1. Substitute $x = 7$ into the function: $g(7) = 4(7) - 3$

2. Perform the calculation: $g(7) = 28 - 3 = 25$

Thus, the value of $g(7)$ is 25.

If you need more details or have questions, feel free to ask! Here are some related questions to explore:

1. What is the value of $f(x)$ for any general $x$?
2. How would you interpret the graph of $f(x)$ and $g(x)$?
3. Can you find $f(0)$ and $g(0)$?
4. What are the zeros of the functions $f(x)$ and $g(x)$?
5. What would happen if we combined $f(x)$ and $g(x)$, e.g., $f(x) + g(x)$?

Tip: Always substitute values carefully and follow through with the operations in sequence to avoid mistakes!