Kimberly has $120 to spend at the bookstore. Kimberly buys a hardcover book for $36, as well as some gift cards
for her family and friends. Each gift card is $15. How many gift cards can Kimberly buy?

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x

Ineed to find the answer to number 2

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.