The Annoying Math Game - Page 2
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Thread: The Annoying Math Game

  1. #11
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    Default Re: The Annoying Math Game




    I haven't done maths for years now, but I always thought you needed simultaneous equations to calculate 2 independant variables. Currently that equation is possible with an infinite amount of numbers because ? will always be equal to 2x + 4. Therefore you can't have a wrong answer.



  2. #12
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    Default Re: The Annoying Math Game

    @Dabney: No, that's not correct. Sorry.

    If it helps, you don't actually have to graph it. It's much more precise to solve the equation. Which of course you can't do because you have an x squared and an x, which aren't like terms and cannot be combined. So you need to convert the equation to something usable. I recommend using a perfect square trinomial.

  3. #13
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    Default Re: The Annoying Math Game

    Ok, who solved the problem first? Yardgames, J, or someone else?(id like to do a turn based thing. whoever solves gets to make the next problem and they can make it extremely easy or extremely hard! )

  4. #14
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    Default Re: The Annoying Math Game

    Whoops, just saw it! J solved it first so therefore it is now his turn to make any problem he wants!

  5. #15
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    Default Re: The Annoying Math Game

    y = -5x^2 + 20x -3

    Basic quadradic equation: y = ax^2 + bx + c

    Formula for the axis of symmetry: x = -b / 2a

    Solving for x:

    x = -20 / 2(-5)
    x = -20 / -10
    x = 2

    Solving for y:

    y = -5 (2)^2 + 20 (2) -3
    -5 (4) + 40 -3
    -20 + 40 - 3
    y =17

    Vertex = (2, 17)
    .

  6. #16
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    Default Re: The Annoying Math Game

    Yep, that's right. Damn, I should have asked you when I was trying to figure out how the hell to do this stuff-that's a lot easier than the way my teacher taught me. Of coures, after he taught us, he gave us a calcuator program that does it automatically--it's great, just type in the numbers and it finds x-intercept, y-intercept, vertex, and a bunch of other crap for you.

  7. #17
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    Default Re: The Annoying Math Game

    Wow. What's ^ mean??
    Malcolm: Where did you get $30??
    Reese: What are you a cop?? (S2E22)

  8. #18
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    Default Re: The Annoying Math Game

    Quote Originally Posted by samboo1
    Wow. What's ^ mean??
    They are using it to represent a squared number, for example 3²





  9. #19
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    Default Re: The Annoying Math Game

    Quote Originally Posted by yardgames
    Yep, that's right. Damn, I should have asked you when I was trying to figure out how the hell to do this stuff-that's a lot easier than the way my teacher taught me. Of coures, after he taught us, he gave us a calcuator program that does it automatically--it's great, just type in the numbers and it finds x-intercept, y-intercept, vertex, and a bunch of other crap for you.
    Yeah, I was wondering why you suggested taking the perfect square trinomial. I guess you could do it that way, but it seems like it would be a lot harder and more and more involved. I hate it when they make you do all that work then tell you that you could just plug it into the calculator. They just do it to torture us.

    I'll let someone else post the next one cause I got rid of my algebra book and I can't think of anything off the top of my head.
    .

  10. #20
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    Default Re: The Annoying Math Game

    Quote Originally Posted by Wildcat
    y = -5 (2)^2 + 20 (2) -3
    -5 (4) + 40 -3
    -20 + 40 - 3
    y =17
    I'm so stupid, I had my mistake there because i mixed up the + and -

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