What is the expanded form 845,212

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

One angle of a linear pair is 10 more than two-thirds the other angle. find the measure of both angles.

Let x have probability generating function gx (s) and let un generating function u(s) of the sequence uo, u1, satisfies p(x > n). show that the (1- s)u(s) = 1 - gx(s), whenever the series defining these generating functions converge.