Only answer if ur absolutely sure it’s right

Which graph represents an even function?

The length of the line segment ac is 8x-9 what is the value of x

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?