If there are 39 people in a room and everyone has to shake hands with everyone exactly once, how many handshakes are there?

Acompany is testing in comparing to lightbulb designs the box plot shows the number of hours that each lightbulb design last before burning out which statement is best supported by the information of the plot

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36