Point m is the midpoint of ab. the coordinates of point a are (-7, 3) and the coordinates of m are (-3, 1). what are the coordinates of point b? ? )

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?