What is the sum of 4x+4 and 4x^2-10x-4

What is the slope of the line shown below?

Which expression is equivalent to -12(3x-3/4)

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?