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anonymous

  • 5 years ago

help me multiply and divide rational expreaaions

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  1. anonymous
    • 5 years ago
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    What is the equation?

  2. anonymous
    • 5 years ago
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    \[24/7^{2} \times 14^{6}/ 40\]

  3. anonymous
    • 5 years ago
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    Ok. Do you understand the "power rules" such as 7^2 = 49?

  4. Yuki
    • 5 years ago
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    usually it makes it easier to break down the numbers into its prime factors for example, 24 = \[2^3 * 3\] then you divide out whatever is on the numerator and denominator

  5. anonymous
    • 5 years ago
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    yeah i understand power rules . but do you cross mutiply

  6. anonymous
    • 5 years ago
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    No. You horizontally multiply. Cross multiplication is for terms on either side of the = sign.

  7. anonymous
    • 5 years ago
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    oh ok got it lol

  8. Yuki
    • 5 years ago
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    for future reference, kitkat, what you wanted to say is probably cross "division" you meant to cancel the terms on the top and the ones on the bottom right?

  9. anonymous
    • 5 years ago
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    whattt ?

  10. anonymous
    • 5 years ago
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    What Yuki was implying... Examine 7^2 and 14^6. How can the 14^6 eliminate 7^2?

  11. anonymous
    • 5 years ago
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    yall are confusing me know .. so i 7\[\times\] 7 = 49 then

  12. anonymous
    • 5 years ago
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    14^6 can be rewritten as 7*2(14^5)

  13. anonymous
    • 5 years ago
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    That will cancel out 7^2 and make it just 7

  14. anonymous
    • 5 years ago
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    so...

  15. anonymous
    • 5 years ago
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    what im really bad at math

  16. anonymous
    • 5 years ago
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    Let me explain :)

  17. anonymous
    • 5 years ago
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    haha ok (:

  18. anonymous
    • 5 years ago
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    (24/7^2) * 14^6/40 = (24/7) / 2(14^5)/40 We've taken a step to reduce the equation

  19. anonymous
    • 5 years ago
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    sorry, i meant (24/7) * 2(14^5)/40

  20. anonymous
    • 5 years ago
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    im confused :/

  21. anonymous
    • 5 years ago
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    24/7 can be rewritten as 6*4/7 and 2(14^5)/40 can be rewritten as 2(14^5)/(4*10) The 4's will cancel and you'll have 6/7 * 2(14^5)/10

  22. anonymous
    • 5 years ago
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    okayy i think i get it so the answer should be 6\[^{4}\]/5

  23. anonymous
    • 5 years ago
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    no the answer will be 92198.4 6 * 2(14^5) = 6453888 7*10=70 3226944/0 6453888/70 = 92198.4

  24. anonymous
    • 5 years ago
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    mmmmm ... idk about that

  25. anonymous
    • 5 years ago
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    lol, it works out. it's tough explaining it on the computer.

  26. anonymous
    • 5 years ago
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    lol it really is but on my answer sheet it says

  27. anonymous
    • 5 years ago
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    A\[6^{4}/5\]. b \[6^{3}/5\] .c.\[336^{6}/280^{2}\]

  28. anonymous
    • 5 years ago
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    or d.\[42^{4}/35\]

  29. anonymous
    • 5 years ago
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    vry odd. I just put it in my TI 89 calc and got my same answer. Bad answer sheet? I'm 99.9% sure I did the math correctly.

  30. anonymous
    • 5 years ago
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    well its for school lol . so..

  31. anonymous
    • 5 years ago
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    Double check with your teacher. I'm very confident I gave you the right solution.

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