Can someone pretty with a cherry on top me solve 8 and 9! their short.

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

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

Asingle die is rolled twice. find the probability of rolling a 3 the first time and a 2 the second time