What is 84 divided into sevenths

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

If a is a nonzero real number then the reciprocal of a is

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?