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anonymous

  • one year ago

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  1. anonymous
    • one year ago
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    @triciaal can you help me. You and I are the only ones online I think lol.

  2. anonymous
    • one year ago
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    the inverse of multiplication is division and for addition is subtraction

  3. anonymous
    • one year ago
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    okay

  4. anonymous
    • one year ago
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    so, the inverse of 1/4x=4x

  5. anonymous
    • one year ago
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    example the inverse of 6x= 1/6x

  6. anonymous
    • one year ago
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    please answer this for me . what is the inverse of 100x?

  7. anonymous
    • one year ago
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    so then it has to be f^-1(x) = 4x - 3

  8. anonymous
    • one year ago
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    x/100 ?

  9. anonymous
    • one year ago
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    nooo. the anser is 1/100x

  10. anonymous
    • one year ago
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    another question. what is the inverse of 20x?

  11. anonymous
    • one year ago
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    1/20x I'm confused. I hate this

  12. anonymous
    • one year ago
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    thats is right

  13. anonymous
    • one year ago
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    okay

  14. anonymous
    • one year ago
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    what is the inverse of 15?

  15. anonymous
    • one year ago
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    -15?

  16. anonymous
    • one year ago
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    just from what you've told me I actually think it's f^-1(x) = 4x - 3 and not the first answer I had. My packet isn't doing a very good job of explaining this.

  17. anonymous
    • one year ago
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    very correct

  18. anonymous
    • one year ago
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    I guess I thought that the x should be in the parenthesis with the 3 but now I know that was super wrong. So thank you :)

  19. anonymous
    • one year ago
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    Also I need to find better explanations of this, my packet does a sucky job.

  20. anonymous
    • one year ago
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    ok

  21. anonymous
    • one year ago
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    thanks again tho

  22. anonymous
    • one year ago
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    Here are simple steps for inverse: Replace f(x) with y Switch x's and y's, so put x where y is and x where y is. Solve for y Replace y with f^-1(x)

  23. anonymous
    • one year ago
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    @iambatman thank you :)

  24. anonymous
    • one year ago
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    Yw :)

  25. anonymous
    • one year ago
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    are you here?

  26. amilapsn
    • one year ago
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    yeah

  27. anonymous
    • one year ago
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    okay

  28. amilapsn
    • one year ago
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    So the original expression will be: \(y=\frac{1}{4}x+3\) ok?

  29. anonymous
    • one year ago
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    right

  30. amilapsn
    • one year ago
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    Can you guess what switching \(x\) and \(y \) means?

  31. anonymous
    • one year ago
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    okay so switching them I thought meant doing 1/4x= y+3

  32. anonymous
    • one year ago
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    that's where I wasn't sure what I was doing.

  33. amilapsn
    • one year ago
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    No that guess was wrong.. ;)

  34. amilapsn
    • one year ago
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    Switching means simply interchanging... For example: Before switching: \(\color{blue}y=2\color{red}{x}+1\) After switching: \(\color{red}{x}=2\color{blue}y+1\) ok?

  35. anonymous
    • one year ago
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    yeah okay so the 1/4 would just stay where it was initially.

  36. amilapsn
    • one year ago
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    exactly! So now what the answer would be?

  37. anonymous
    • one year ago
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    it would be f^-1(x)= 4x-3?

  38. amilapsn
    • one year ago
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    no... Not quite. after switching what would you get?

  39. anonymous
    • one year ago
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    okay so the problem would look like x=1/4y+3 the inverse of addition is subtraction (like said above)

  40. anonymous
    • one year ago
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    f^-1(x) = 4(x-3)

  41. anonymous
    • one year ago
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    iambatman said to solve for y how would I do that?

  42. amilapsn
    • one year ago
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    that's right!

  43. anonymous
    • one year ago
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    so the first answer I had was right the entire time?

  44. anonymous
    • one year ago
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    @GIL.ojei did we do it wrong the first time around? Would you say that it's right this time?

  45. amilapsn
    • one year ago
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    yep.. BTW solving for y means expressing y in terms of x. that means you've got \(x=\frac{1}{4}y+3\) after switching.. After solving for \(y \) means just getting \(y=4(x-3)\)

  46. amilapsn
    • one year ago
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    ok?@GIL.ojei

  47. anonymous
    • one year ago
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    @lily1021 IS Y=4X-12 OR 4(X-3) IN YOUR OPTION?

  48. anonymous
    • one year ago
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    yep those were both in my options which why I was torn between them. I didn't know what made them different.

  49. anonymous
    • one year ago
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    oh wait I missed the 12 in your post. No y=4x-12 is not in my options but 4(x-3) is

  50. anonymous
    • one year ago
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    OK . GO WITH THAT .

  51. anonymous
    • one year ago
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    okay thank you. and big thanks to @amilapsn for coming back and helping me through this. It means so much to me you have no idea lol :)

  52. amilapsn
    • one year ago
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    YX @lily1021 lol :D

  53. anonymous
    • one year ago
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    I have another similar one I have to solve but I think it would kinda be the same. Can I post so you can check? I'll do it in a new post so I can medal you.

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