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SerenitysMommy

  • 4 years ago

Which of the graphs below represent the graphical solution to the following system of equations? 4x + y = 5 3x – 7y = 27

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  1. amistre64
    • 4 years ago
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    |dw:1323884953333:dw|

  2. SerenitysMommy
    • 4 years ago
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    Whats the points ?

  3. SerenitysMommy
    • 4 years ago
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    And non of my graphs show close to looking like that =/

  4. amistre64
    • 4 years ago
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    itd be better if we could see your graphs since this thing isnt actually a precise rendition :)

  5. JoãoVitorMC
    • 4 years ago
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    |dw:1323885260622:dw|

  6. amistre64
    • 4 years ago
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    that one might work :)

  7. SerenitysMommy
    • 4 years ago
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    I will try and drawl my answer choices

  8. JoãoVitorMC
    • 4 years ago
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    you need the point of intersection?

  9. amistre64
    • 4 years ago
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  10. SerenitysMommy
    • 4 years ago
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    I have a answer choice that shows that!!! How'd you get the answer

  11. JoãoVitorMC
    • 4 years ago
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    so you need the intersection, i will calc and show here

  12. amistre64
    • 4 years ago
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    you draw the line and see where they cross ....

  13. SerenitysMommy
    • 4 years ago
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    How do you know what line to drawl?

  14. amistre64
    • 4 years ago
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    the x and y values are from the equations that are given

  15. SerenitysMommy
    • 4 years ago
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    ? Explain? Im looking at the numbers and not getting how you draw them

  16. amistre64
    • 4 years ago
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    4x + y = 5 when x=0. y=? (0,y) 4(0) + y = 5 0 + y = 5 y = 5 (0,5) when y = 0 x = ? (x,0) 4x + y = 5 4x + 0 = 5 4x = 5 x = 5/4 (5/4 , 0) plot the points, and since they are lines ... conect the dots

  17. amistre64
    • 4 years ago
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    then work the other line in the same way

  18. SerenitysMommy
    • 4 years ago
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    Ohhhhhhh.

  19. amistre64
    • 4 years ago
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    any 2 points will work, just have to find them. x=0 the y=0 tends to be the easiest way tho

  20. JoãoVitorMC
    • 4 years ago
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    \[y = -4x +5\]\[3x -7y=27\]\[3x -7(-4x +5)=27\]\[x =2\]\[y =-4(2)+5\]\[y = \]\[P(2, -3)\]

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