Tickets to a museum cost $12 for each adult and $9 for each child. What would be the best choice for variable(s) when writing an expression for the total cost of attending the museum?


At would represent the total number of tickets sold

Ba would represent the total area/square footage of the museum

Ca would represent the total number of adult tickets bought, and c would represent the total number of child tickets bought

Da would represent the cost per adult ticket, and c would represent the cost per child ticket