Question

nora is looking for the sum of a number, n, and 21. what is the sum nora is looking for if n = 9?

Explanation:

Step1: Define the sum expression

The sum of $n$ and 21 is $n + 21$.

Step2: Substitute $n=9$

Substitute $n=9$ into the expression: $9 + 21$

Step3: Calculate the result

$9 + 21 = 30$

Answer:

30