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geekfromthefutur

  • one year ago

I need help with algebra ll hmwrk

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  1. geekfromthefutur
    • one year ago
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    |dw:1442715709951:dw|

  2. Nnesha
    • one year ago
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    okay what about it ?what's the statement ?

  3. geekfromthefutur
    • one year ago
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    Find the inverse

  4. Nnesha
    • one year ago
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    f(x) is same as y so replace f(x) with y \[\huge\rm\color{ReD}{ y}=\frac{ -12-2\color{blue}{x} }{ 3 }\] to find inverse(f^{-1}(x)) `switch x and y` \[\huge\rm\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{ 3 }\] now solve for y

  5. geekfromthefutur
    • one year ago
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    im stuck lol

  6. Nnesha
    • one year ago
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    alright its okay what u got so fr

  7. geekfromthefutur
    • one year ago
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  8. geekfromthefutur
    • one year ago
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    Hows that lol

  9. Nnesha
    • one year ago
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    i have no idea what did you type into the calculator ??......

  10. geekfromthefutur
    • one year ago
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    The problem you showed me

  11. Nnesha
    • one year ago
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    there isn't any radical in my comment not even exponent what are you talking about ? o.O

  12. Nnesha
    • one year ago
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    |dw:1442716563503:dw|\(\color{blue}{\text{Originally Posted by}}\) @Nnesha f(x) is same as y so replace f(x) with y \[\huge\rm\color{ReD}{ y}=\frac{ -12-2\color{blue}{x} }{ 3 }\] to find inverse(f^{-1}(x)) `switch x and y` \[\huge\rm\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{ 3 }\] now solve for y \(\color{blue}{\text{End of Quote}}\)

  13. geekfromthefutur
    • one year ago
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    i put the x= one into wolf fram

  14. Nnesha
    • one year ago
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    do you know how to solve that equation for y ?

  15. Nnesha
    • one year ago
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    first we nee to get rid of the denominator at right side so multiply both sides by 3

  16. geekfromthefutur
    • one year ago
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    substitute y for f(x) then solve x in terms of y then switch x and y and then replace the y with f^-1(x)

  17. Nnesha
    • one year ago
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    yes right so how would you solve x in terms of y ?

  18. Nnesha
    • one year ago
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    \[\huge\rm\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{ 3 }\] first multiply both sides by 3

  19. geekfromthefutur
    • one year ago
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    ok so 3x-12 or

  20. Nnesha
    • one year ago
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    \[\huge\rm\color{green}{3}·\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{\cancel{ 3} }·\color{green}{\cancel{3}}\] multiply both sides by 3 at right side 3 cancels out then u get \[\huge\rm 3x=-12-2y\] now move the -12 at left side how would you do that would add ,subtract,multiply or divide 12 both sides ?

  21. geekfromthefutur
    • one year ago
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    multiply

  22. Nnesha
    • one year ago
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    hmm no it's `-12 -2y` -12 is subtracting with -2y so you should apply the opposite of `subtraction` which is addition so add 12 both sides

  23. geekfromthefutur
    • one year ago
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    ok add negative 12 to both or positive

  24. Nnesha
    • one year ago
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    it's negative 12 at right side so what is opposite of negative ?

  25. geekfromthefutur
    • one year ago
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    positive

  26. Nnesha
    • one year ago
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    yes so to cancel out -12 you should add

  27. geekfromthefutur
    • one year ago
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    yea

  28. Nnesha
    • one year ago
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    |dw:1442717916498:dw| let me know what you get

  29. Nnesha
    • one year ago
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    DON"t add 3x and 12 it's not 15 okay! :=)

  30. geekfromthefutur
    • one year ago
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    Ok

  31. geekfromthefutur
    • one year ago
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    ok well 12 and 12 make 24

  32. Nnesha
    • one year ago
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    |dw:1442718071794:dw|

  33. geekfromthefutur
    • one year ago
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    oh

  34. geekfromthefutur
    • one year ago
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    0

  35. Nnesha
    • one year ago
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    to solve for y we need to move -12 and -2 to the left side so we should cancel out the 12

  36. Nnesha
    • one year ago
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    and you can't add 3x with -12 so that would stay the same |dw:1442718149403:dw|

  37. Nnesha
    • one year ago
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    now one and last step cancel out the -2 from right side how would you do that ?

  38. geekfromthefutur
    • one year ago
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    {-3x-12}/{2}

  39. Nnesha
    • one year ago
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    it's -2 · y (multiplication) apply the opposite of multiplication

  40. Nnesha
    • one year ago
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    oh never mind good job!

  41. Nnesha
    • one year ago
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    \[y=\frac{ -3x-12 }{ 2 } =\] is same as \[y=\frac{ -3 x}{ 2 } -\frac{ 12 }{ 2 }\] you can divide 12/2

  42. geekfromthefutur
    • one year ago
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    lol yea i just started school so we are now started doing these and i got a 2/26 on my review and

  43. Nnesha
    • one year ago
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    okay got 2 mints divide 12/2 = ?

  44. geekfromthefutur
    • one year ago
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    oh 6

  45. Nnesha
    • one year ago
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    yes so \[y=\frac{ -3 x}{ 2 } -6\]

  46. Nnesha
    • one year ago
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    and let me tell you how to put that inot the calculator x=(-12-2y)/3 (PARENTHESES FOR SAFETY

  47. geekfromthefutur
    • one year ago
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    oh ok ^-^

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