Answer:
f(4) = 19
Step-by-step explanation:
Since we are given f(4), we substitute the x values with the number 4.
f(x) = 4x + 3
f(4) = 4(4) + 3
After substituting the x values with 4, solve the equation normally.
f(4) = 16 + 3
f(4) = 19
Our final answer is f(4) = 19
