In how many different ways can 5 boys be seated in 3 chairs (Yes they will not all fit; only 3 will be able to fit at a time)? *

Evaluate the following expression 1/3^2

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?