Solve the system of equations y=9x+13 y=2x+48

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x, y) ?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?