1. The problem is to evaluate the expression $9 + e$ where $e$ is the mathematical constant approximately equal to 2.718. 2. The constant $e$ is the base of the natural logarithm and is an irrational number. 3. To find the sum, simply add 9 and $e$: $$9 + e \approx 9 + 2.718 = 11.718$$ 4. Therefore, the value of $9 + e$ is approximately 11.718.