Timothy recorded the monthly change in his savings account balance, in dollars, for 8 months. month january february march april may june july august balance change (dollars) −30 −15 55 40 −20 −45 −10 65 what is the average monthly change in timothy's savings account balance? enter your answer in the box.

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.