Concept explainers
As in the text, consider biodiesel and petrodiesel mixtures that are 30% biodiesel and 70% petrodiesel. Let B stand for an unspecified number of liters of biodiesel, which can vary, and let P stand for the corresponding number of liters of petrodiesel in such mixtures. Reason about quantities and our definition of multiplication, and use a math drawing to explain the equation
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