If you roll two number cubes what is the probability of their sum being seven or higher

Can someone me and plz do the problem

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

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?