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Mathematics 12 Online
OpenStudy (anonymous):

when the justices of the supreme court assemble to go on the bench each day each justice shakes hands with each of the other justices for a total of 36 handshakes. the total number of handshakes "h" possible for "n" people is given by h=n^2-n/2. write and solve an equation to determine the number of justices on the supreme court.

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