Darrell has already taken 13 pages of notes on his own, and he will take 3 pages during each hour of class. In all, how many hours will Darrell have to spend in class before he will have a total of 43 pages of notes in his notebook?

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?