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rebecca1233

Which system has (1, 3) as the solution? Which system has infinite solutions? Which system has (-8, 0) as the solution? Which system has no solutions? Which system has (-2, -2) as the solution? A) x + y = -1 4x + 4y = -4 B) x - 4y = -8 2x - 3y = -16 C) x + y = -4 -3x + 2y = 2 D) 4x + 6y = -12 2x + 3y = 9 E) x - y = -2 3x - y = 0

  • one year ago
  • one year ago

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  1. annas
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    A) 4x+4y=-4(multi eq 1 with 4) 4x+4y=-4 subtract both eq we'll get 0 = 0

    • one year ago
  2. rebecca1233
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    thats a right ?

    • one year ago
  3. rebecca1233
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    wait thats the 4th one so A= 4

    • one year ago
  4. rebecca1233
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    or a = 2

    • one year ago
  5. annas
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    B) 2x - 8y = -16(multi eq1 with 2) 2x - 3y = -16 subtracting both eqs -5y = 0 y=0 x= -8 (-8,0)

    • one year ago
  6. annas
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    A system of eq has no solution

    • one year ago
  7. rebecca1233
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    so A= is the 4th one like i said

    • one year ago
  8. annas
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    yes

    • one year ago
  9. rebecca1233
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    what bout the other two

    • one year ago
  10. annas
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    can you solve the rest ???

    • one year ago
  11. rebecca1233
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    Which system has (1, 3) as the solution?

    • one year ago
  12. annas
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    B system of eq has solution set = (-8,0)

    • one year ago
  13. rebecca1233
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    E) x - y = -2 3x - y = 0

    • one year ago
  14. rebecca1233
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    that is correct right ?

    • one year ago
  15. annas
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    wait

    • one year ago
  16. annas
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    E) x - y = -2 3x - y = 0 subtracting both eqs -2x=-2 x= 1 y=3 (1,3) yes E has solution set (1,3)

    • one year ago
  17. rebecca1233
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    Thought so..

    • one year ago
  18. rebecca1233
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    is c the last option

    • one year ago
  19. annas
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    C)2x +2 y = -8(multi with 2) -3x + 2y = 2 subtract both eqs 5x=-10 x= -2 y=-2 (-2,-2) C has solution set (-2,-2)

    • one year ago
  20. rebecca1233
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    so i am right :)

    • one year ago
  21. annas
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    yes :)

    • one year ago
  22. rebecca1233
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    then D is the second one

    • one year ago
  23. annas
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    D) 4x + 6y = -12 4x + 6y = 18(multi by 2) subtract both eqs 0 = -30 so D has infinite solutions

    • one year ago
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