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anonymous

  • one year ago

Someone please help me with this matrices problem!!! Will medal and fan!

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Just use logic. Test out numbers and see which ones fit.

  3. anonymous
    • one year ago
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    ya I was going to do that but I its not multiple choice and I'm not sure how to use matrices to solve the problem...

  4. anonymous
    • one year ago
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    It doesn't need to be multiple choice. I already figured out what x, y, and z are just by using logic.

  5. anonymous
    • one year ago
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    I'll give you a couple of tips. In the second line, you notice that 4x and 5y added only get 3, so that means either x or y is negative. In the third line, you notice that y minus-3 times z is -10 so that means y is a small number and z is definitely positive.

  6. anonymous
    • one year ago
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    I know but I have to write out each step using matrices to get credit...

  7. anonymous
    • one year ago
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    Oh

  8. anonymous
    • one year ago
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    hate systems like that

  9. anonymous
    • one year ago
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    ya me too... anyway thanks for trying to help

  10. misty1212
    • one year ago
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    HI!!

  11. misty1212
    • one year ago
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    this is very long and annoying you have to use some sort of elimination

  12. misty1212
    • one year ago
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    i would cheat if it was me

  13. misty1212
    • one year ago
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    you can multiply the first equation by \(-4\) and add it to the second that will eliminate the \(x\) terms, then you will be left with two equations and two unknowns

  14. anonymous
    • one year ago
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    You didn't read my previous comment did you? I have to show my work with the matrices to get credit

  15. misty1212
    • one year ago
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    \[-4x-4y-4z=-16\\ 4x+5y=3\] add and get oh i see are you supposed to row reduce the matrix? it is really the same thing exactly

  16. anonymous
    • one year ago
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    I'm not sure...

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