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    bluepooh07's Avatar
    bluepooh07 Posts: 1, Reputation: 1
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    #1

    Oct 8, 2011, 12:19 PM
    Math mixture problems?
    A store mixes red fescue worth $12 per pound and chewings fescue worth $15 per pound. The mixture it to sell for $14 per pound. Find how much of each should be used to make a 228 pound mixture
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 9, 2011, 05:59 AM
    Let the amount of the red fescue be 'a' and that of the other be 'b'

    The total mixture will have a mass of a + b = 228

    Then, their price will be related to their mass.

    1 pound -> $12
    a pounds -> 12a

    So, b pounds -> 15b

    So that:
    12a + 15b = 14

    You have two equations with two unknowns. Find a and b using simultaneous equations :)

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