2865 students participated in a competitive exam. There were 60 rooms in the university. Equal number of students were placed in each room. How many students
were not seated in any one of the rooms?

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Having a hard time understanding this question (see attachment).

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.