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cupcake_queen

  • 2 years ago

find the y-intercept 3x+4y=36

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  1. Mr.Math
    • 2 years ago
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    Set \(x=0\) and solve for \(y\).

  2. KKJ
    • 2 years ago
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    For the y-intercept, x = 0 3(0) + 4y = 36 4y = 36 y = 9 Hence the y-intercept is (0, 9)

  3. cupcake_queen
    • 2 years ago
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    i thpught u divded -4 to 36 and 3

  4. cupcake_queen
    • 2 years ago
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    and then i got -3/4x+9

  5. qpHalcy0n
    • 2 years ago
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    That's correct. That's slope intercept form (y = mx + b), here "b" is your y-intercept.

  6. cupcake_queen
    • 2 years ago
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    ya and then u graph it right

  7. qpHalcy0n
    • 2 years ago
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    Sure. If you need to. Then your slope is "m" (-3/4)

  8. qpHalcy0n
    • 2 years ago
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    So then from 9, you can either move down 3 and right 4, or up 3 and left 4.

  9. cupcake_queen
    • 2 years ago
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    |dw:1348438352348:dw|

  10. qpHalcy0n
    • 2 years ago
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    Something like that, yes ;)

  11. cupcake_queen
    • 2 years ago
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    cause i went high

  12. qpHalcy0n
    • 2 years ago
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    You can also find the x-intercept by setting y = 0, and solving for x.

  13. cupcake_queen
    • 2 years ago
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    oh ok thanks

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