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Math Help - Need to catch up on some algebra... don't know where to start...

  1. #1
    Junior Member Melancholy's Avatar
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    Need to catch up on some algebra... don't know where to start...

    I think this problem is algebra... it says I need to know it to move on to the next chapter... but I'm in Geometry... I'm suppossed to not do algebra anymore! *sigh*

    Evaluate each expression for the given value of n.

    3n - 2;n = 4

    (n+1) + n;n = 6

    There are several problems like these in different forms, but first could someone walk me through the steps of how to find the answer to these, and please, for the love of pizza, could someone tell me what the ";" does?? It must do something simple right? The ";" is what I don't know what to do with I guess... I've never seen problems like this...
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Melancholy View Post
    ... but I'm in Geometry... I'm suppossed to not do algebra anymore! *sigh*
    i found that statement somewhat funny


    Evaluate each expression for the given value of n.

    3n - 2;n = 4

    (n+1) + n;n = 6
    no big deal here. just plug in the value for n in the expressions on the left and calculate their answer. so, for the first, you would replace n with 4 in 3n - 2 and calculate that
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  3. #3
    Junior Member Melancholy's Avatar
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    no big deal here. just plug in the value for n in the expressions on the left and calculate their answer. so, for the first, you would replace n with 4 in 3n - 2 and calculate that
    Bu, but, um... *confused*... there are so many n's... um...

    So I take the 4 on the other side of the equal sign and put it on the 3(n)? Which makes it 12? So then I have 12 - 2;n= 0... or = 4?

    What is the semi colon for though? *cries*

    I'm confused Mr. All Knowing ... lol...
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Melancholy View Post
    Bu, but, um... *confused*... there are so many n's... um...

    So I take the 4 on the other side of the equal sign and put it on the 3(n)? Which makes it 12? So then I have 12 - 2;n= 0... or = 4?

    What is the semi colon for though? *cries*

    I'm confused Mr. All Knowing ... lol...
    ......ok, so i'm still not exactly sure what you're getting hung up on, so let me do the first one for you.

    Evaluate \bold {3n - 2} for  \bold {n = 4}

    when n = 4:

    3n - 2 = 3(4) - 2

    ......... = 12 - 2

    ......... = 10

    .........viola!


    Oh! I see, you thought they were in one equation. no, my dear Melancholy. (read the instructions ... and i'm not all knowing)
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  5. #5
    Junior Member Melancholy's Avatar
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    Oh.

    So the ";" wasn't actually part of the problem. It was just to separate the two thingamabobs. I GET IT! See, I get frightened easily I swear!

    So then...

    (n+1) + n ; n = 6

    (6 + 1) + 6
    7 + 6
    13

    Big deal. lol!

    So that was right, right?
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  6. #6
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Melancholy View Post
    Oh.

    So the ";" wasn't actually part of the problem. It was just to separate the two thingamabobs.
    exactly ...the thingamabobs... well, at least you're getting your math jargon down

    I GET IT! See, I get frightened easily I swear!

    So then...

    (n+1) + n ; n = 6

    (6 + 1) + 6
    7 + 6
    13

    Big deal. lol!

    So that was right, right?
    yes, it is a big deal, isn't it? anyway, that is correct. now i'm going to bed, i have to wake up in like 4 hours
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  7. #7
    Junior Member Melancholy's Avatar
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    Thank you so muchly! And I have to wake up in 5 hours too, uhg. Have a good sleep! I'm hitting the sack as well...

    *terminator voice*

    I'll be back!
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  8. #8
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Melancholy View Post
    Thank you so muchly! And I have to wake up in 5 hours too, uhg. Have a good sleep! I'm hitting the sack as well...
    don't hit the sack! what did it ever do to you, huh?! you're so violent.

    *terminator voice*

    I'll be back!
    i'll be waiting...is that a quote from anywhere?
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  9. #9
    Senior Member DivideBy0's Avatar
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    Quote Originally Posted by Jhevon View Post
    i'll be waiting...is that a quote from anywhere?
    Countless movies where the hero/heroine promises to return but never does.
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