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Math Help - Math Project

  1. #1
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    Unhappy Math Project

    Ok, I have a math project. We have to pick a month (I chose November which has 30 days) and make an equation for each of those days. These are our variables that we can use only once per equation, and we have to use each variable once per equation.

    A= 1 B= -2 C= 3 D= -4


    I need help creating the equations, the only numbers that I need now are: 13, 14, 16, 18, 19, 20, 27, 28, and 29.

    We can only use the order of operations (Parenthesis, Exponents, Multiplication, Division, Addition and Subtraction)

    EXAMPLE:

    d-b+axc= 1



    Thanks so much!!
    Last edited by susie44; September 5th 2007 at 09:33 AM.
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  2. #2
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    Oh

    Oh and the answer cannot be negative.
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by susie44 View Post
    Ok, I have a math project. We have to pick a month (I chose November which has 30 days) and make an equation for each of those days. These are our variables that we can use only once per equation, and we have to use each variable once per equation.

    A= 1 B= -2 C= 3 D= -4


    I need help creating the equations, the only numbers that I need now are: 9, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 26, 27, 28, 29, and 30.

    We can only use the order of operations (Parenthesis, Exponents, Multiplication, Division, Addition and Subtraction)

    EXAMPLE:

    d-b+axc= 1



    Thanks so much!!
    You mean something like
    b - a - c \times d = 9?

    -Dan
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  4. #4
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    Thumbs up yes!!

    yes thank you so much! do you know anymore?
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  5. #5
    MHF Contributor red_dog's Avatar
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    -a+b-cd=13
    -ab-cd=14
    a-b-cd=15
    d^{a+b+c}=16
    (a-d)c-b=17
    (-b-d)ac=18
    (-b-d)c+a=19
    (c-b)(a-d)=20
    (c-d)(a-b)=21
    (a-d)^{-b}-c=22
    (-cd+a)(-b)=26
    c^{-b}(-a-d)=27
    (a-d)^{-b}+c=28
    (-b)^{a-d}-c=29
    (a-d)(-bc)=30
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  6. #6
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    Quote Originally Posted by red_dog View Post
    -a+b-cd=13
    -ab-cd=14
    a-b-cd=15
    d^{a+b+c}=16
    (a-d)c-b=17
    (-b-d)ac=18
    (-b-d)c+a=19
    (c-b)(a-d)=20
    (c-d)(a-b)=21
    (a-d)^{-b}-c=22
    (-cd+a)(-b)=26
    c^{-b}(-a-d)=27
    (a-d)^{-b}+c=28
    (-b)^{a-d}-c=29
    (a-d)(-bc)=30



    thanks, some of these were very helpful. but you can't change the value of the variable, meaning you can't make A into -A. thanks thouhg
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  7. #7
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by susie44 View Post
    thanks, some of these were very helpful. but you can't change the value of the variable, meaning you can't make A into -A. thanks thouhg
    that makes no sense. you listed "subtraction" as one of your allowed operations. so saying -A is just saying subtract A or possibly the negative of A, which we can make it work anyway

    which of red_dog's answers do you have a problem with? the ones with the powers?
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  8. #8
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    sorry

    Quote Originally Posted by Jhevon View Post
    that makes no sense. you listed "subtraction" as one of your allowed operations. so saying -A is just saying subtract A or possibly the negative of A, which we can make it work anyway

    which of red_dog's answers do you have a problem with? the ones with the powers?


    yeah i realized that after i posted the reply, im sorry. idk why but i always forget that rule and i ran back through the problems and found some more that worked
    thanks
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  9. #9
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    and yes, the ones with the powers didnt work on my calculator (its an advanced one) and then i tried it manually, but it didn't work out either. but still, some did work (even though they didnt come out to the answer he said)
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