If we are in a room of five people we can determine the number of handshakes by this line of reasoning: the first person will shake his own hand of the first person they already shook, the third person will shake two hands same reasoning the fourth person will shake 1 hand that of the fifth person. the fifth person will shake 0 hands. so there will be a total of 1+2+3+4= 10 handshakes. determine the number of handshakes, h, that will occur for each number of people , n, in a particular room

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright