Pre-calculus

A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of laboratory rats a daily diet of precisely 34.53 units of niacin and 25,430 units of retinol. She uses two types of commercial pellet foods. Food A contains 0.14 unit of niacin and 130 units of retinol per gram. Food B contains 0.29 unit of niacin and 90 units of retinol per gram. How many grams of each food does she feed this group of rats each day?

food a____g
food b____g

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  1. This is just Algebra I.
    If there are
    a grams of A
    b grams of B

    .14a + .29b = 34.53
    130a + 90b = 25430

    Now just find a and b.

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