Final answer:
To solve the expression 9 + 9 - p with p = 1, you substitute the value of p into the expression, simplify it by adding 9 + 9 to get 18, and then subtract 1 to end up with the final answer, which is 17.
Step-by-step explanation:
The student has asked to evaluate the expression 9 + 9 - p using p = 1, and though q = 1 is provided, it isn't needed for this calculation. To solve this, we simply substitute the value of p into the expression, obtaining:
9 + 9 - p = 9 + 9 - 1
After substitution, we perform the arithmetic:
9 + 9 - 1 = 18 - 1 = 17
So the final answer is 17.