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Math Help - Unsure on a problem

  1. #1
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    Unsure on a problem

    I'm doing some fraction division, and on one problem i got an answer which was abnormally higher than all the other answers, which i found a little odd..so i want to get this checked and see if i did it right. the answers im comparing it to are correct, i checked in back of book(only has odd numbered problem answers)
    49x/3.5

    49x • 7
    over1• over2

    simplified..
    171.5

    er, the fractions came out kinda weird, but..the data is correct, the only problem is reading it
    Last edited by Nightfire; October 9th 2007 at 04:33 PM. Reason: fractions were worse than expected, im just using .5 for half's, or over1/over2 on the next line
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Nightfire View Post
    I'm doing some fraction division, and on one problem i got an answer which was abnormally higher than all the other answers, which i found a little odd..so i want to get this checked and see if i did it right. the answers im comparing it to are correct, i checked in back of book(only has odd numbered problem answers)
    1
    49x/3 and -
    2
    49x 7 343x
    --- - = -----
    1 2 2
    simplified..
    1
    171 ---
    2

    er, the fractions came out kinda weird, but..the data is correct, the only problem is reading it
    just type the fractions like this...(numerator)/(denominator)

    so if you wanted to type something like \frac {2x + 1}{5} + \frac {5x}{x + 1} = \frac {3x}4 you would type:

    (2x + 1)/5 + (5x)/(x + 1) = (3x)/4

    now try again
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  3. #3
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    okay, here goes:
    49x divided by 3 1/2
    (49x)/1 7/2
    (343x)/2
    simplified...
    171 1/2
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Nightfire View Post
    okay, here goes:
    49x divided by 3 1/2
    (49x)/1 7/2
    (343x)/2
    simplified...
    171 1/2
    you did not follow my instructions

    anyway, you are wrong. to divide by a fraction, you multiply by its reciprocal, so you should have 49x \times \frac 27

    how did you end up with numbers at the end? where did the x go?
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  5. #5
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    Ah, i see, i forgot to flip the 7/2 when i made it improper, and i forgot to put the x in the end on the post..didnt on the problem
    thanks, i'll rework it
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