Okay could some one > 441/825 is a fraction could you all me simplify this?

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Whats the name of the vertical axis

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?