August eats a mix of Food X and Food ? Y for lunch. The amount of protein, calories,and sodium per ounce for each is shown in the table below. August's lunch should provide atleast 520 calories but less than or equal to 750 milligrams of sodium. August would like to maximize the amount of protein in his lunch mix. Let ? denote the number of ounces for Food X and let ? denote the number of ounces of Food Y. Topic: Graphical Method

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