All the donated computers were shared equally by 5 classrooms. which expression represents the number of computers each classroom received?

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?