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anonymous

  • one year ago

I am going to fail plz help me i am begging i will fan and metal if you help Two lines, A and B, are represented by the equations given below: Line A: y = x − 2 Line B: y = 3x + 4 Which of the following shows the solution to the system of equations and explains why? (−3, −5), because the point does not lie on any axis (−3, −5), because the point satisfies both equations (−4, −8), because the point satisfies one of the equations (−4, −8), because the point lies between the two axes

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  1. anonymous
    • one year ago
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    plz help me!

  2. Vocaloid
    • one year ago
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    Didn't I already answer this for you? Line A y = x − 2 Line B: y = 3x + 4 x - 2 = 3x + 4 solve for x, then substitute that value for x to get y

  3. anonymous
    • one year ago
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    i told you i didnt get it!

  4. Vocaloid
    • one year ago
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    what are you still confused about?

  5. anonymous
    • one year ago
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    i just dont get it

  6. Vocaloid
    • one year ago
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    do you know how to solve x - 2 = 3x + 4?

  7. anonymous
    • one year ago
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    i just want to know how to solve it and have it explained it to me

  8. Z4K4R1Y4
    • one year ago
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    |dw:1432753311665:dw| what does that tell you about the two lines?

  9. Vocaloid
    • one year ago
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    well, let's break it down step by step: x - 2 = 3x + 4 what happens when you add 2 to each side?

  10. anonymous
    • one year ago
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    i dont know what you mean Do you mean: 2x-2=3x=6?

  11. Vocaloid
    • one year ago
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    no, that's multiplication ADD 2 to each side of the equal sign (+2)

  12. Vocaloid
    • one year ago
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    x - 2 + 2 = 3x + 4 + 2 see how I added + 2 to each side?

  13. anonymous
    • one year ago
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    yes

  14. Vocaloid
    • one year ago
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    great! x - 2 + 2 = x, do you agree?

  15. anonymous
    • one year ago
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    umm idk it doesnt look right because what did you do with the 3

  16. Vocaloid
    • one year ago
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    I am only looking at the left side of the equal sign x - 2 + 2 = 3x + 4 + 2 JUST look at the left side of the equals sign: x - 2 + 2 do you agree that x - 2 + 2 = x?

  17. anonymous
    • one year ago
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    yes i do

  18. Vocaloid
    • one year ago
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    good! so now we have: x = 3x + 4 + 2, do you agree? we replace the left side with x because x - 2 + 2 = x

  19. anonymous
    • one year ago
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    yes okay i am starting to get it a little bit

  20. Vocaloid
    • one year ago
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    ok, now just look at the right side: 3x + 4 + 2 do agree that 3x + 4 + 2 = 3x + 6?

  21. anonymous
    • one year ago
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    yes i do

  22. Vocaloid
    • one year ago
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    awesome, now we put both sides together: x = 3x + 6 but we're not done yet

  23. Vocaloid
    • one year ago
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    what happens when you subtract 3x from each side?

  24. anonymous
    • one year ago
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    would it become x=3x+3x+6?

  25. Vocaloid
    • one year ago
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    not quite. let's break it down into two steps: this is the left side: x this is the right side: 3x + 6 now SUBTRACT 3x from the left side, what do you get?

  26. Vocaloid
    • one year ago
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    remember how we added + 2 before? it's the same thing, except you SUBTRACT 3x instead of ADDING 2

  27. anonymous
    • one year ago
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    would x= become -3x?

  28. Vocaloid
    • one year ago
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    Not quite, what is x minus 3x?

  29. anonymous
    • one year ago
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    3x

  30. Vocaloid
    • one year ago
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    no, what is x - 3x?

  31. Vocaloid
    • one year ago
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    easier question, what is 1 - 3?

  32. anonymous
    • one year ago
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    -2

  33. Vocaloid
    • one year ago
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    right! so what do you think x - 3x is?

  34. anonymous
    • one year ago
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    are you saying that it is -2x?

  35. Vocaloid
    • one year ago
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    YES! we're done with the left side, let's move to the right side: 3x + 6 now subtract 3x and tell me what you get!

  36. anonymous
    • one year ago
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    6x? 3x+6=9x 9x-6x=(3x)?

  37. Vocaloid
    • one year ago
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    I'm not sure where you're getting 9x "subtract 3x" means minus 3 x 3x + 6 - 3x = ?

  38. anonymous
    • one year ago
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    6x

  39. Vocaloid
    • one year ago
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    no, please try again

  40. Vocaloid
    • one year ago
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    easier question: what is a + b - a?

  41. anonymous
    • one year ago
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    b

  42. Vocaloid
    • one year ago
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    Right! so what is 3x + 6 - 3x?

  43. anonymous
    • one year ago
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    2?

  44. Vocaloid
    • one year ago
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    no, please try again... easier question: what is 3x - 3x?

  45. anonymous
    • one year ago
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    0x

  46. Vocaloid
    • one year ago
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    right, and 0x is the same as 0, right? so what is 3x + 6 - 3x?

  47. Vocaloid
    • one year ago
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    |dw:1432755049920:dw|

  48. Vocaloid
    • one year ago
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    IMPORTANT: 6 is NOT the same as 6x! 3x + 6 - 3x = 6, do you agree?

  49. Vocaloid
    • one year ago
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    |dw:1432755224507:dw|

  50. anonymous
    • one year ago
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    i dont get it i thought it was 6x

  51. Vocaloid
    • one year ago
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    nope, it's just 6! here is the original problem: 3x + 6 - 3x see how 6 is in the middle?

  52. anonymous
    • one year ago
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    or 6

  53. anonymous
    • one year ago
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    yes

  54. Vocaloid
    • one year ago
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    it's 6! REMEMBER: 6 is NOT the same as 6x

  55. anonymous
    • one year ago
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    ohh okay!!!!

  56. Vocaloid
    • one year ago
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    anyway, now that you understand, let's put the left side and the right side together again: -2x = 6, do you agree?

  57. anonymous
    • one year ago
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    yes

  58. Vocaloid
    • one year ago
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    can you solve for x now?

  59. Vocaloid
    • one year ago
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    what does x = ?

  60. anonymous
    • one year ago
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    x=-3

  61. anonymous
    • one year ago
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    ?

  62. Vocaloid
    • one year ago
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    YES! We're about halfway there. Now look at the original problem: Line A = x - 2 Line B = 3x + 4 let's look at line A: y = x - 2 we know that x = -3, so what is y?

  63. anonymous
    • one year ago
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    would that be 2y, -2y, 2, or -2

  64. anonymous
    • one year ago
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    if it is even 2

  65. Vocaloid
    • one year ago
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    y = x - 2 = (-3) - 2 = ?

  66. anonymous
    • one year ago
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    -4

  67. Vocaloid
    • one year ago
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    not quite, please check your math again

  68. anonymous
    • one year ago
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    -3?

  69. Vocaloid
    • one year ago
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    nope, please try again: what is -3 - 2?

  70. anonymous
    • one year ago
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    ohh -5

  71. Vocaloid
    • one year ago
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    RIGHT! since y = x - 2 AND x = -3, we know that y = -3 -2, since we can replace x with -3 anyway, we know that x = -3 and y = -5 so the solution is (x,y) = (-3,-5)

  72. anonymous
    • one year ago
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    is it a or b i thought it was b

  73. Vocaloid
    • one year ago
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    YES, it's b. (-3,-5) is where line A and line B intersect

  74. Vocaloid
    • one year ago
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    that's what I meant by "solve for x" and "solve for y". It just means, find the value of x and y

  75. anonymous
    • one year ago
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    omg thank you so much!!!!

  76. Vocaloid
    • one year ago
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    no problem, I'm glad you get it now

  77. anonymous
    • one year ago
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    thank you again you are amazing i gave you a metal and fanned you

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