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Math Help - Matrix(2)

  1. #1
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    Question Matrix(2)

    The matrix S represent the stock of 2 items in two stores. Matrix O represent the order that each store has placed for these items. Matrices S and O are shown below:
    Stocks item Orders item
    S = StoreA 8 15 O = StoreA 2 1
    StoreB 20 17 StoreB 12 0

    When the stores receive their shipments, which matrix represent their current stock?

    a) 6 14 b) 196 8 c) 36 47 d) 10 16
    8 17 244 20 96 180 32 17

    I've multiplied SXO and I got matrix B but it doesn't seem right.
    Please help
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  2. #2
    MHF Contributor
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    Boy, it's hard to see columns in your matrices. One way to line things up by using a fixed-width font is to wrap a matrix or table in the CODE tags (the icon # above the editor).

    I assume the matrices are as follows.
    Code:
             Item1  Item2
    S = StoreA   8     15
        StoreB  20     17
    
             Item1  Item2
    O = StoreA   2      1
        StoreB  12      0
    I also assume that when the stores receive their shipments, the orders are added to their corresponding stock. I don't see the need for multiplication. Can you figure the answer?
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