Final answer:
To simplify the expression 5 + 5a, substitute a numerical value for a and calculate the result.
Step-by-step explanation:
To simplify the expression 5 + 5a, we need to substitute a numerical value for a. Let's say we substitute a with the value 2. We can then calculate the expression as follows:
5 + 5(2) = 5 + 10 = 15
So, when we substitute a with the value 2, the expression simplifies to 15.
Learn more about Expression simplification