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Math Help - Qbkr has spoiled me

  1. #1
    Junior Member Soldja Soul3ss's Avatar
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    Qbkr has spoiled me

    Answers would be greatly appreciated, brief explanations also......but just answers would be fine lol.






    Thanx for the help so far guys, thanx qbkr for givin me the straight up answers lol.
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  2. #2
    Bar0n janvdl's Avatar
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    1. True
    2. False
    3. True
    4. C
    5. D
    6. B
    7. D
    8. A
    9. C
    10. ???
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  3. #3
    Junior Member Soldja Soul3ss's Avatar
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    Hmmm i got a C so thats about........3 answers wrong (including 10) but i passed so i gave you a thanx :P.
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  4. #4
    Super Member
    earboth's Avatar
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    Quote Originally Posted by Soldja Soul3ss View Post
    Answers would be greatly appreciated, brief explanations also......but just answers would be fine lol....
    Hello,

    to #10: B

    √(24x^3) = √(4x^2 * 6x) = 2x*√(6x)
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  5. #5
    Junior Member Soldja Soul3ss's Avatar
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    Hmm interesting.......cuz i did put B as an answer im sure.
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  6. #6
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    Quote Originally Posted by janvdl View Post
    1. True
    2. False
    3. True
    4. C
    5. D
    6. B
    7. D
    8. A
    9. C
    10. ???
    jan... you got them wrong for him
    Well, I guess it's better to explain:

    so rational and irrational numbers.
    A rational number is one that can be expressed as:
    m/n (where m and n are INTEGERS (whole numbers)

    1. 1/3 is NOT irrational, why?
    because....
    1/3 = 0.33 (recurring)
    let 0.33 (recurring) = x
    10x = 3.33 (recurring)
    10x - x = 3
    9x = 3
    x = 3/9 (3 and 9 are whole numbers!)

    therefore the answer is FALSE

    2. Already as I have said (m/n for rational numbers)
    4/7 are both integers which means that it is RATIONAL

    answer: TRUE

    3. yup sq. root 2 is IRRATIONAL (you can't express it in m/n)
    I think there's another way to prove it too btw but I don't remember it

    answer: TRUE

    4. sq. root 128 (what's the sq. root sign on the keyboard btw? :S)
    sq. root 128 = sq. root 64 x (times) sq. root 2
    as we know root 64 = 8
    answer = 8 x sq. root 2 = C

    5. this is the same as:
    - (sq. root 18) x (sq. root 245) you should be able to work this out for yourself
    = - sq. root 4410
    which is:
    - sq. root (441 x 10)

    which is the same as:
    -21 x sq. root 10 (-21 is sq. root of 441)

    answer is D

    I'll do the rest later, tired now, hope you understand
    zzzzzzzzzzzzzzzzzzzzzzzzzz
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  7. #7
    Junior Member Soldja Soul3ss's Avatar
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    Thanx geometer i guess i'll let you or qbkr do the rest of my things rofl. j/k, all help is welcome though, i appreciate everyones help and assistance and ofc...........answers lol.
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  8. #8
    Bar0n janvdl's Avatar
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    Im sorry, i mixed answer 1 and 2 up...

    I'm sure all the others should be correct.
    Last edited by janvdl; May 8th 2007 at 04:40 AM.
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