Penny needs 12 ounces of a snack mix that is made up of chocolate and almonds.

the chocolate costs $3.50 per ounce and almonds cost $4.50 per ounce.

penny has $50 to spend and plans to spend it all.

let x = the amount of chocolate
let y = the amount of almonds

determine which equations you would use to form a system of equations for this scenario.