Four people in a room. Each shakes hands with each other once. How many handshakes are there?

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?

Divide reduce the answer to lowest term 3/7 divided 1 1/6

If f(x) = 5х – 2 and g(x) = 2х + 1, find (f – g)(x).