Solve for x & y...4

Discussion in 'Other Pre-University Math' started by nycmathguy, Jun 24, 2022.

  1. nycmathguy

    nycmathguy

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    IMG_20220624_181917.jpg
     
    nycmathguy, Jun 24, 2022
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  2. nycmathguy

    MathLover1

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    correct
     
    MathLover1, Jun 24, 2022
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  3. nycmathguy

    nycmathguy

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    This is too easy for me to get wrong.
     
    nycmathguy, Jun 25, 2022
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  4. nycmathguy

    MathLover1

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    using your result: upload_2022-6-24_18-11-56.gif

    determinants must be equal

    80(1/2)-(-4*25)=25*5.2-x*0
    140=130 -> false
     
    MathLover1, Jun 25, 2022
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  5. nycmathguy

    nycmathguy

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    Very good. There are two more matrix equations here unanswered. Also, check out my threads in the Off-topic Chat forum. I posted some basic trigonometric equations in the Geometry & Trigonometry forum.
     
    nycmathguy, Jun 25, 2022
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