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toadytica305

  • 3 years ago

Using Cramers Rule, what is (x,y) x+3y=-19 -7x + 2y = 41

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  1. tkhunny
    • 3 years ago
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    D = (1*2) - ((-7)*3) Now what?

  2. toadytica305
    • 3 years ago
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    D=23 Dx=-161 Dy=-92 therefore (-1/7, 4/7) But it's saying the answer is -7,-4

  3. tkhunny
    • 3 years ago
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    D is the denominator. You're upside down.

  4. toadytica305
    • 3 years ago
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    That would make a lot of sense...Thank you!

  5. tkhunny
    • 3 years ago
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    You were close. Good work.

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