What is the expression 4x^2 - 25 is equivalent to

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?

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost