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Tahmina

  • 3 years ago

can some one please help me with this::

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  1. Tahmina
    • 3 years ago
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    Write the equation of a line that is: perpendicular to 9x + 3y = 15 and goes through the point (-6, 7)

  2. Brittni0605
    • 3 years ago
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    What do you know about the slopes of perpendicular lines?

  3. Fox375
    • 3 years ago
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    y = - 3x + 18

  4. Fox375
    • 3 years ago
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    i used a program called geogebra.

  5. Tahmina
    • 3 years ago
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    how did u get that

  6. Fox375
    • 3 years ago
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    Geogebra

  7. Fox375
    • 3 years ago
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    http://www.geogebra.org/cms/

  8. Brittni0605
    • 3 years ago
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    Programs are good, but its important to know how to do it by hand.

  9. Tahmina
    • 3 years ago
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    I know i found it but I dont want to use it

  10. Brittni0605
    • 3 years ago
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    Ok, do you want me to help you?

  11. Fox375
    • 3 years ago
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    It is very simple yo use. They even provide help for you too solve these kind of probelms.

  12. Tahmina
    • 3 years ago
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    Yes I need your help Brittni0605

  13. Brittni0605
    • 3 years ago
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    Ok, so what do you know about the slopes of perpendicular lines?

  14. Tahmina
    • 3 years ago
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    you have to multiply them by -1

  15. Tahmina
    • 3 years ago
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    rite? idk

  16. Brittni0605
    • 3 years ago
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    Umm, sort of on the right track. Perpendicular lines have slopes that are negative reciprocals. Do you know what that means?

  17. Tahmina
    • 3 years ago
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    No can u be a little clear on that?

  18. Tahmina
    • 3 years ago
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    So you mean B mutiply 3 *-1/3

  19. Tahmina
    • 3 years ago
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    i got 3 because its the slope isnt it?

  20. Brittni0605
    • 3 years ago
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    |dw:1355586908724:dw|

  21. Tahmina
    • 3 years ago
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    Okay whats the slope then wait you need to find the slope first rite?

  22. Brittni0605
    • 3 years ago
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    Yes.

  23. Tahmina
    • 3 years ago
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    slope is 3

  24. Tahmina
    • 3 years ago
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    rite?

  25. Brittni0605
    • 3 years ago
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    No, its not 3. Show me your work.

  26. Tahmina
    • 3 years ago
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    okay

  27. Tahmina
    • 3 years ago
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    |dw:1355587318034:dw|

  28. Brittni0605
    • 3 years ago
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    Your work is correct. But you said the slope is 3. Your work shows something different.

  29. Tahmina
    • 3 years ago
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    oh sorry its negative 3 thanks for showing that

  30. Brittni0605
    • 3 years ago
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    No prob. SO, now that you know the slope of your line is -3, what is the slope of its perpendicular line?

  31. Tahmina
    • 3 years ago
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    \[-3 *1/3\]

  32. Tahmina
    • 3 years ago
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    rite?

  33. Tahmina
    • 3 years ago
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    wait what about the points (-6,7)

  34. Brittni0605
    • 3 years ago
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    No, remember if the slope of your line is -6, the slope of its perpendicular line is the negative reciprocal (1/6)

  35. Tahmina
    • 3 years ago
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    wiat whats the slope of the perspendicular then

  36. Tahmina
    • 3 years ago
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    *perpendicular

  37. Brittni0605
    • 3 years ago
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    Perpendicular slope is the negative reciprocal of the slope of your line

  38. Tahmina
    • 3 years ago
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    so the slope of my line is -3 that means my perpendicular slope is -3 *1/3 rite?

  39. Brittni0605
    • 3 years ago
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    No, you're not multiplying anything.

  40. Tahmina
    • 3 years ago
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    so my perpendicular lines slope is 1/3 rite

  41. Brittni0605
    • 3 years ago
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    Yes.

  42. Tahmina
    • 3 years ago
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    so do i substitute with y=mx+b

  43. Brittni0605
    • 3 years ago
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    Yes.

  44. Tahmina
    • 3 years ago
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    can u check my work???/

  45. Brittni0605
    • 3 years ago
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    Yes, ill check your work.

  46. Tahmina
    • 3 years ago
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    okay imm attach it

  47. Brittni0605
    • 3 years ago
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    Ok.

  48. Tahmina
    • 3 years ago
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    Nevermind my computers having problems?

  49. Brittni0605
    • 3 years ago
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    Umm, ok

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