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mbloodworth

  • 2 years ago

By multiplying matrices, calculate the matrix for total dollar volume of sales. I know how to multiply matrices, but this question makes absolutely no sense. What do I multiply?

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  1. mbloodworth
    • 2 years ago
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  2. RaphaelFilgueiras
    • 2 years ago
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    linear combination of columns cr*C1+cp*C2

  3. mbloodworth
    • 2 years ago
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    But if you did that, how would the determinant be found? That makes no sense how that can be found if it is in the rows and columns like that. So in thousands, would the first be 10000,000?

  4. RaphaelFilgueiras
    • 2 years ago
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    that is not determinant

  5. RaphaelFilgueiras
    • 2 years ago
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    |dw:1372136163766:dw|

  6. mbloodworth
    • 2 years ago
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    Im sorry, I have been working on a ton of stuff. It's past midnight my time. How can you find that?

  7. mbloodworth
    • 2 years ago
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    Math is not my forte. As I am sure you can tell, haha.

  8. RaphaelFilgueiras
    • 2 years ago
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    the result is only the sum of cr*first column and cp*second column

  9. mbloodworth
    • 2 years ago
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    Right, so what would that be? In thousands? Because that is what it is listed as in the problem copied

  10. RaphaelFilgueiras
    • 2 years ago
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    |dw:1372136309101:dw|

  11. RaphaelFilgueiras
    • 2 years ago
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    |dw:1372136488612:dw|

  12. RaphaelFilgueiras
    • 2 years ago
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    now just add them

  13. mbloodworth
    • 2 years ago
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    okay. so what I am going to do (just to make sure I understand the drawings) 1. 500*200, 500*15, 500*5 2. 600*30, 600*5, 600*2 Then add the results of 500*2 and 600*30 together, and so on? Is that correct?

  14. mbloodworth
    • 2 years ago
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    Sorry, 20

  15. RaphaelFilgueiras
    • 2 years ago
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    yes

  16. mbloodworth
    • 2 years ago
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    Awesome. Thanks so much!!

  17. RaphaelFilgueiras
    • 2 years ago
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    multiplication by left is linear combination of columns, and by right is linear combination of rows

  18. mbloodworth
    • 2 years ago
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    I'm sorry I don't quite understand that. Can you put in smaller terms? Like I said, math is not my forte.

  19. RaphaelFilgueiras
    • 2 years ago
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    |dw:1372136788063:dw|

  20. RaphaelFilgueiras
    • 2 years ago
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    |dw:1372137032274:dw|

  21. mbloodworth
    • 2 years ago
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    okay question, on logarithms... 7^(3x - 1) = 5^(x - 1) what is x?

  22. RaphaelFilgueiras
    • 2 years ago
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    |dw:1372138198267:dw|

  23. mbloodworth
    • 2 years ago
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    so would that be 12.33, -3.09, or .08?

  24. RaphaelFilgueiras
    • 2 years ago
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    lol, let me see

  25. mbloodworth
    • 2 years ago
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    you're awesome lol

  26. RaphaelFilgueiras
    • 2 years ago
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    ~0.08

  27. mbloodworth
    • 2 years ago
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    thanks a billion

  28. RaphaelFilgueiras
    • 2 years ago
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    yw

  29. mbloodworth
    • 2 years ago
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    i wish i could pay you to help me lol

  30. RaphaelFilgueiras
    • 2 years ago
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    i wish it too lol

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