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Thread: A=1/2h(a+b)

  1. #1
    Domestic Domestique UnsafeAlpine's Avatar
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    A=1/2h(a+b)

    I'd like to take after phantomcow and have Foosters help me solve algebra problems.

    solve for a

    2A=h(a+b)
    2A=ha+hb
    2A-hb=ha
    (2A-hb)/h = a


    did I do it right?

  2. #2
    Hey guyz? Guyz? Wait up!! Siu Blue Wind's Avatar
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    *enters thread* Nerd Alert!! *runs*
    Quote Originally Posted by Buddha
    We are what we think. All that we are arises with our thoughts. With our thoughts, we make the world.
    Quote Originally Posted by making View Post
    Please dont outsmart the censor. That is a very expensive censor and every time one of you guys outsmart it it makes someone at the home office feel bad. We dont wanna do that. So dont cleverly disguise bad words.

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    L T X B O M P F A N S R apricissimus's Avatar
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    You are correct.

    My first instinct would have been to divide each side by h first, then subtract b from both sides, but it amounts to the same thing.

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    L T X B O M P F A N S R apricissimus's Avatar
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    Looks like you've got a nice trapezoid on your hands, btw.

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    Domestic Domestique UnsafeAlpine's Avatar
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    ha! just noticed that...

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    Senior Member huytheskigod's Avatar
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    Quote Originally Posted by apricissimus View Post
    Looks like you've got a nice trapezoid on your hands, btw.
    Isn't there a law against poaching zoids?

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    Senior Member MrCrassic's Avatar
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    yes.
    Ride more.

    Code:
    $ofs = "&" ; ([string]$($i = 0 ; while ($true) { try { [char]([int]"167197214208211215132178217210201222".substring($i,3) - 100) ; $i =
     $i+3 > catch { break >>)).replace('&','') ; $ofs=" " # Replace right angles with right curly braces

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    superArti artifice's Avatar
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    isn't it
    (2A/h)-b=a

    but then, I haven't taken math in a looong time.

  9. #9
    Bring May Flowers aprilm's Avatar
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    Quote Originally Posted by artifice View Post
    isn't it
    (2A/h)-b=a

    but then, I haven't taken math in a looong time.
    I thought the same thing, but his answer is actually the same as yours/ours.

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    The Improbable Bulk Little Darwin's Avatar
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    Quote Originally Posted by artifice View Post
    isn't it
    (2A/h)-b=a

    but then, I haven't taken math in a looong time.

    Since b=hb/h it is actually the same thing, just written differently. The earlier answer just writes the whole thing in a single term, all over h.
    Slow Ride Cyclists of NEPA

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  11. #11
    superArti artifice's Avatar
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    oh yeah, I see that now that I opened my eyes :-D

  12. #12
    Dude wheres my guads? skinnyone's Avatar
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    is this a serious question?

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    Domestic Domestique UnsafeAlpine's Avatar
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    oh yeah...I started my math class and this is the "refresher" worksheet

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    The Improbable Bulk Little Darwin's Avatar
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    What math class are you taking?

    I miss the old days when math classes made sense... back before Abstract Algebra...
    Slow Ride Cyclists of NEPA

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    - Ralph Waldo Emerson

  15. #15
    Domestic Domestique UnsafeAlpine's Avatar
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    Oh, it's just College Algebra

  16. #16
    The Improbable Bulk Little Darwin's Avatar
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    That is where it is still fun for me... The advanced stuff is actually still fun, just harder for me to get a good grade, so more stressful.

    Good luck!
    Slow Ride Cyclists of NEPA

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  17. #17
    cab horn
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    College algebra? This is like grade 5 stuff people.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

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    riding once again jschen's Avatar
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    Quote Originally Posted by Little Darwin View Post
    I miss the old days when math classes made sense... back before Abstract Algebra...
    Hey, I liked abstract algebra! I took it as an elective while studying chemistry since my math major roommate assured me that I would like it. And sure enough, it was a really fascinating math class.

    As for the OP, I generally wouldn't go undoing factoring when someone has already done the factoring for you. This is why artifice and aprilm naturally end up at their form of the answer. Your answer ultimately is correct, but there's rarely a good reason to go multiplying terms together when they're already factored out for you. Why? Read on...

    Multiplying is easy compared to factoring. If you want to multiply later, you can always do so, for no more work than it would be to do so right away. But if you want to factor later, it's generally more work to undo your multiplication than it was to actually do the multiplication. (In this relatively easy case, it's actually the same amount of work. But it's never less work.) So it's better to defer multiplication until you see a clear reason to do so (if this ever becomes the case) than to preemptively multiply stuff together.
    If you notice this notice then you will notice that this notice is not worth noticing.

  19. #19
    Dude wheres my guads? skinnyone's Avatar
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    Quote Originally Posted by UnsafeAlpine View Post
    oh yeah...I started my math class and this is the "refresher" worksheet
    Got you.. For a second I thought that this was part of college algebra, the main course that is

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    L T X B O M P F A N S R apricissimus's Avatar
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    Quote Originally Posted by skinnyone View Post
    Got you.. For a second I thought that this was part of college algebra, the main course that is
    "College Algebra" is usually the same thing as high school algebra though. It's rehash of what people have learned, and since forgotten, in high school.

    The "Abstract Algebra" mentioned on this thread is an entirely different beast.

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    Dude wheres my guads? skinnyone's Avatar
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    Quote Originally Posted by apricissimus View Post
    "College Algebra" is usually the same thing as high school algebra though. It's rehash of what people have learned, and since forgotten, in high school.

    The "Abstract Algebra" mentioned on this thread is an entirely different beast.
    I didnt go to college in the US & A so its lost upon me. But if it is as you say, it makes me slightly worried. Abstract Algebra was kick A

  22. #22
    Domestic Domestique UnsafeAlpine's Avatar
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    Quote Originally Posted by apricissimus View Post
    "College Algebra" is usually the same thing as high school algebra though. It's rehash of what people have learned, and since forgotten, in high school.

    The "Abstract Algebra" mentioned on this thread is an entirely different beast.
    From what I understand, this is pretty much high school algebra II, with a few thing tacked on. Of course, I never took algebra II. I got as far as algebra I and that was 14 years ago.

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    L T X B O M P F A N S R apricissimus's Avatar
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    Quote Originally Posted by skinnyone View Post
    I didnt go to college in the US & A so its lost upon me. But if it is as you say, it makes me slightly worried. Abstract Algebra was kick A
    "Abstract algebra" is where you learn about groups, rings, and fields, and such.

    I don't like the term, because all algebra is abstract.

    But whatev.

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