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anonymous

  • one year ago

Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. 3x + 5y - 2w = -13 2x + 7z - w = -1 4y + 3z + 3w = 1 -x + 2y + 4z = -5

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  1. anonymous
    • one year ago
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    these are my answers

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  2. arindameducationusc
    • one year ago
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    4 variables, 4 equations..... you can solve each value...

  3. anonymous
    • one year ago
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    not really but i can try

  4. arindameducationusc
    • one year ago
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    @Vocaloid would you like to try this one?

  5. anonymous
    • one year ago
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    3x + 5y - 2w = -13 x=3

  6. anonymous
    • one year ago
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    2x + 7z - w = -1 x=2

  7. anonymous
    • one year ago
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    sorry x= -2

  8. anonymous
    • one year ago
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    am i getting these right

  9. anonymous
    • one year ago
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    @mathmate

  10. anonymous
    • one year ago
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    -x + 2y + 4z = -5 x=4

  11. arindameducationusc
    • one year ago
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    no not like that.... i will solve it, wait....

  12. anonymous
    • one year ago
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    ohh ok

  13. arindameducationusc
    • one year ago
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    you have to solve one equation for one varialble, here2x=-13-5y+2w now put this in second equation.... 2x+7z-w=-1 =>-13-5y+2w+7z-w=-1

  14. arindameducationusc
    • one year ago
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    You have to do like this okay?

  15. anonymous
    • one year ago
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    yeah im lost

  16. anonymous
    • one year ago
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    @mathmate

  17. anonymous
    • one year ago
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    is the answer a

  18. arindameducationusc
    • one year ago
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    suppose x+y=15 and 2x+8y=10 we solve x and y. same way we are solving 4 variables

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