Maurice puts 130 trading cards in protector sheets. he fills 7 sheets and puts the remaining 4 cards in the eighth sheet. each of the filled sheets has the same number of cards. how many cards are in each filled sheet?

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?