A nutritionist is creating a supplement blend using two ingredients: Ingredient P and Ingredient Q. Ingredient P contains 20% protein by weight, and Ingredient Q contains 35% protein by weight. The nutritionist wants to create a blend that contains a total of 150 grams of protein. The equation represents this situation, where is the weight in grams of Ingredient P used and is the weight in grams of Ingredient Q used.
Which of the following is the best interpretation of in this context?
The total weight of protein from Ingredient Q
The percentage of protein in Ingredient Q
The total weight in grams of Ingredient Q used
The total weight of the supplement blend
