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lisa2345

  • one year ago

Is the answer B? I have to simplify. PICTURE BELOW WILL MEDAL :)

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  1. lisa2345
    • one year ago
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  2. UsukiDoll
    • one year ago
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    yes it is B

  3. lisa2345
    • one year ago
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    wait can you stay for more?

  4. UsukiDoll
    • one year ago
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    depends on the question...if it's easy... no problem

  5. lisa2345
    • one year ago
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  6. lisa2345
    • one year ago
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    this is kinda tricky I think its A or B im not sure

  7. UsukiDoll
    • one year ago
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    well we need the exponent laws for \[\frac{a^m}{a^n} \rightarrow a^{m-n}\] take it one at a time. for example if we have a = y, m = 5 and n = 3, we have \[\frac{y^5}{y^3} \rightarrow y^{5-3}\]

  8. UsukiDoll
    • one year ago
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    what is 5-3?

  9. lisa2345
    • one year ago
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    2

  10. UsukiDoll
    • one year ago
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    yes so you have \[y^2 \]. Now do the same thing for the z exponent

  11. lisa2345
    • one year ago
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    z6

  12. lisa2345
    • one year ago
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    Z^6

  13. UsukiDoll
    • one year ago
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    yes so your answer is \[y^2z^6\]

  14. lisa2345
    • one year ago
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    why isn't a fraction?

  15. lisa2345
    • one year ago
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    why isnt it a fraction*

  16. UsukiDoll
    • one year ago
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    we have positive exponents, so there's no denominator... if you have a negative exponent like \[a^{-n} \rightarrow \frac{1}{a^n}\] then we need to rewrite it. Negative exponents are usually not allowed.

  17. lisa2345
    • one year ago
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    thats how the next one looks hold up Im going to post it

  18. UsukiDoll
    • one year ago
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    ok.. A negative exponent just means that the base is on the wrong side of the fraction line, so you need to flip the base to the other side.

  19. UsukiDoll
    • one year ago
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    I just use the elevator rule.. whenever the negative exponent is on the numerator it goes down to the denominator... when there is a negative exponent on the denominator it goes up to the numerator.

  20. lisa2345
    • one year ago
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  21. lisa2345
    • one year ago
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    my teacher said there shouldnt be any negative exponent in my final answer

  22. UsukiDoll
    • one year ago
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    \[\frac{a^m}{a^n} \rightarrow a^{m-n}\] only this time we have a y = x, m = -5, and n = 9 so we have \[\frac{x^{-5}}{x^9} \rightarrow x^{-5-9}\] so what is -5-9 ?

  23. lisa2345
    • one year ago
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    -14

  24. UsukiDoll
    • one year ago
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    yes but due to the fact that negative exponents aren't allowed we need to rewrite is as \[\frac{1}{x^{14}}\] We define a number with a negative exponent \[a^{-n} = \frac{1}{a^n}\] It is the reciprocal of that number with a positive exponent The \[a^{-n}\] is the reciprocal of \[a^n \]

  25. lisa2345
    • one year ago
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    I'm going to post the last 4, im going to answer the next one tell me if im wrong

  26. lisa2345
    • one year ago
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  27. lisa2345
    • one year ago
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    is it A?

  28. UsukiDoll
    • one year ago
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    no

  29. lisa2345
    • one year ago
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    its B

  30. UsukiDoll
    • one year ago
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    \[\frac{a^m}{a^n} \rightarrow a^{m-n} \] (exponent law) a = b, m =-2 n = -6. what's -2-6 ?

  31. UsukiDoll
    • one year ago
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    wait hold on.. I messed up . x.x

  32. UsukiDoll
    • one year ago
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    -2-(-6)

  33. lisa2345
    • one year ago
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    4 lol

  34. UsukiDoll
    • one year ago
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    first one was right sorry sorry ^^

  35. lisa2345
    • one year ago
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    oh I got it right?

  36. lisa2345
    • one year ago
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    its A?

  37. UsukiDoll
    • one year ago
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    yeah because I neglected something

  38. lisa2345
    • one year ago
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  39. lisa2345
    • one year ago
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    heres where it gets harder 2 more after this one by the way

  40. UsukiDoll
    • one year ago
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    weeeeee distributing exponents...

  41. UsukiDoll
    • one year ago
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    it's either write the whole fraction 7 times and add the exponents one by one or just distribute the exponent on x and y which is must faster

  42. lisa2345
    • one year ago
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    so its D?

  43. UsukiDoll
    • one year ago
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    it's like we have x or x to the first power... \[(x^1)^7 \rightarrow (x^{(1)(7)})\] yes it is

  44. lisa2345
    • one year ago
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    it is D or no?

  45. UsukiDoll
    • one year ago
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    it's D

  46. lisa2345
    • one year ago
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    okay 1 more after this one :)

  47. lisa2345
    • one year ago
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  48. lisa2345
    • one year ago
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    is it B?

  49. UsukiDoll
    • one year ago
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    no.. because you are distributing the 5 distribution is multiplication . the 3 and the z portion is right for B but not x

  50. lisa2345
    • one year ago
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    so its A because of 2 times 5?

  51. lisa2345
    • one year ago
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    ??

  52. UsukiDoll
    • one year ago
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    oh yeah... sorry I was trying to prove something to another user... it is A because you are distributing the exponent 5 all over the entire problem so you should have 3^5 x^(2)(5)/z^5

  53. UsukiDoll
    • one year ago
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    and 2 x 5 = 10

  54. lisa2345
    • one year ago
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    heres the last one

  55. lisa2345
    • one year ago
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  56. UsukiDoll
    • one year ago
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    I'll give a hint: all of them switch places thanks to the distribution of the negative. whatever is on the numerator goes to the denominator and whatever is on the denominator goes on the numerator.

  57. lisa2345
    • one year ago
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    D?

  58. UsukiDoll
    • one year ago
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    no... the -4 wasn't distributed on the 3 and when you have a problem like this you need to distribute everything.. all the numbers and variables have that distribution .

  59. lisa2345
    • one year ago
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    okay

  60. lisa2345
    • one year ago
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    C?

  61. UsukiDoll
    • one year ago
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    yes

  62. lisa2345
    • one year ago
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    thank you so so much, are you going to be online still in like 8min?

  63. UsukiDoll
    • one year ago
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    because of the -4 which is already a negative exponent 3^(-4)x^(-4) goes down and y^(-4) goes up

  64. UsukiDoll
    • one year ago
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    I think I should still be there... on os

  65. lisa2345
    • one year ago
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    theres another math homework I need help with so ill get back to you in a bit :) thank you by the way

  66. UsukiDoll
    • one year ago
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    ok :)

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