Help please :-)

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

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.

Find the distance between the point (-3,-4), and (see the picture below)