Four married couples. shake hands, but no one shakes hands with their own spouse (or with themselves, of course). at the end of the party, how many people they shook hands with and receives seven different responses. how many people did rose shake hands with?

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

Factor this polynomial completely x^2-64

Which function has an inverse function? a.f(x)= |x+3|/5 b. f(x)= x^5-3 c. f(x)= x^4/7+27 d. f(x)= 1/x²