Show that the sum, over the set of people at a party, of the number of people a person has shaken hands with, is even. assume that no one shake his or her own hand.

How many cups of lemonade were sold in all? Write and solve an equation

An automatic car wash takes exactly 5 minutes to wash a car. on an average 10 cars per hour arrive at the car wash. suppose that 30 minutes before closing time, 5 cars are in line.

What is 69 over 25 as a terminating decimal

23,45 seven. 9 plus 38seven. 15

What is a frequency distribution of qualitative data and why is it useful?

A snail travels 3 feet in one hour. In each subsequent hour, the snail travels three-fourths the distance it traveled in the previous hour. How far does the snail travel in 6 hours

A right triangle has legs that are 19 in. and 23 in. What is the area of the triangle

What equation results from completing the square and then factoring x2+4x=12

In two years the value of a car chnaged from 14,000 to 11,200 what is the percent of change

What is the difference 4 1/3 - (-2/3)