Final answer:
To determine the number of terms in the expression 2k + 15 - m - 3 + n - 7p, we count each variable and constant separately, resulting in 6 terms.
Step-by-step explanation:
The student is asking about the number of terms in an algebraic expression. The expression provided is 2k + 15 - m - 3 + n - 7p. To find the number of terms, we need to count each variable and constant that is being added or subtracted. In this case, the terms are 2k, 15, -m, -3, +n, and -7p. This gives us a total of 6 terms.