(A-REI) Consider the following system of equations. 3x - 5y = 4
5x + y = 16
Determine the y-coordinate of the solution of the
system.

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?