186k views
3 votes
A class of students earns 10 points for every homework assignment they do. If all but 4 students did their homework, what is the expression for the total number of points earned by the class?

a) 10n - 40
b) 10n + 40
c) 10n - 4
d) 10n + 4

1 Answer

3 votes

Final answer:

The correct expression for the total number of points earned by the class is 10n - 40, accounting for all but four students not completing their homework.

Step-by-step explanation:

The expression for the total number of points earned by the class is 10n - 40. This is derived by first assigning n to represent the total number of students in the class. Since each student earns 10 points for their homework, the total points for all students is 10n. However, as 4 students did not do their homework, their potential points are not included in the total. Thus, we subtract 40 points (which is 10 points for each of the 4 students) from the total, resulting in the expression 10n - 40.

User Psyx
by
7.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories