This is very simple but i get confused sometimes lol
what is the change in temperature from 15° to -9°?

6°
-6°
24°
-24°

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?