More russian candy me and my brother

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

How do i do this? i don’t understand

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?