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

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September 18th 2007, 09:53 PM
Melancholy

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... :o
September 18th 2007, 09:56 PM
Jhevon

Quote:

Originally Posted by Melancholy

... but I'm in Geometry... I'm suppossed to not do algebra anymore! *sigh*

i found that statement somewhat funny

Quote:

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
September 18th 2007, 10:05 PM
Melancholy

Quote:

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...
September 18th 2007, 10:11 PM
Jhevon

Quote:

Originally Posted by Melancholy

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...

...:confused:...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)
September 18th 2007, 10:16 PM
Melancholy

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?
September 18th 2007, 10:18 PM
Jhevon

Quote:

Originally Posted by Melancholy

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

Quote:

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
September 18th 2007, 10:20 PM
Melancholy

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!
September 18th 2007, 10:21 PM
Jhevon

Quote:

Originally Posted by Melancholy

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.

Quote:

*terminator voice*

I'll be back!

i'll be waiting...is that a quote from anywhere?
September 18th 2007, 10:47 PM
DivideBy0

Quote:

Originally Posted by Jhevon

i'll be waiting...is that a quote from anywhere?

Countless movies where the hero/heroine promises to return but never does.