Suppose there are 20 persons in a birthday party. How many handshakes are there altogether if everyone shakes hands with each other? questions: a. what is the equation of the function? b. how did you get the equation? c. if there are 100 persons, how many handshakes are there given the same condition?
one person handshakes 19 people because he cant handshake himself. 19 handshakes per person 20 people so 19x20 = 380 handshakes a.) f(x) = x(x-1) b.) by looking the solution 19 is 20-1 which is x c.100(100-1) = 9900 handshakes
