Convert 3 1/2 cups of flour in a recipe that serves 6 to one that serves 9

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

What expression is equivalent to 42x-56y

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?