At a gathering of 10 people, there are 4 people who all know each other and 6 people who know no one. People who do not know each other shake hands. How many handshakes occur?

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Use this graph to find the cost of 6 show tickets