There are 18 students in Mr. Alvarez's art class. Throughout the year, every student must pair up with every other student to complete a project. How many projects will be finished? a. 149 b. 153 c. 171 d. 135

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.