Which of the sets of ordered pairs represents a function? a = {(3, −5), (4, 6), (−3, 9), (2, 7)} b = {(2, 4), (−1, −7), (5, 6), (4, 3)} only a only b both a and b neither a nor b

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Find the quotient. 50a2 – 98b2 -5a +7b

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?