If I put 8 black checkers and 8 white checkers into a bag, what is the probability that I can choose 2 white checkers?

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

Side xy of triangle xyz is extended to point w, creating a linear pair with ∠wyz and ∠xyz. measure of an exterior angle what is the value of x? 64 80 100 180

∠1 and ∠2 are vertical angles. ∠2 has a measure of 63°. what is the measure of ∠1 ? enter your answer in the box.