There are 7 students in a class: 5 boys and 2 girls.
if the teacher picks a group of 4 at random, what is the probability that everyone in the group is a boy?

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Which of the following shows the length of the third side, in inches, of the triangle below