A, b, and c are polynomials, where a = n, b = 2n + 6, and c = n2 – 1. what is ab – c in simplest form?

a=–n2 + 3n + 5
b=n2 + 6n + 1
c=2n2 + 6n – 1
d=3n2 + 5

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?