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Algebra help

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Scolson
Posts: 2904 - Karma: 92
This stuff is probably really easy but it's from the beginning of the year and i have no idea.

1)3-2i/4+3i

2)I thought i could solve this system by substituting but i fucked that up.
(3x-2y=7
(x+4y=7

and this one) f(x)= 3x^2 -1
Jun 7 2007 12:35PM
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Scolson
Posts: 2904 - Karma: 92
damn i pressed repply accidentally


this one) f(x)= 3x^2 -1 g(x)=2/x

f (little circle thingy here) g(4) is what i need
Jun 7 2007 12:37PM
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Scolson
Posts: 2904 - Karma: 92
bump i really need to pass.
Jun 7 2007 10:28PM
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ThaLetterM.
Posts: 8609 - Karma: 1,612
i just took my algebra II exam today and i gotta tell you...i have no idea about anything. sorry man.
Jun 7 2007 10:32PM
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Travapple.
Posts: 6787 - Karma: 88
help scot.......

hes growing a third ear......
Jun 7 2007 10:36PM
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t-roy
Posts: 4041 - Karma: 52
it's been 7 years since algebra, but #2 y=1 x=3 am i right? haha
Jun 7 2007 10:40PM
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Scolson
Posts: 2904 - Karma: 92
yeah, Im supposed to show work so i'll write down some garbage.


k thx
Jun 7 2007 10:43PM
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kristie
Posts: 1667 - Karma: 214
The second one is y=1.21 and x=5.79 I think.  
Jun 7 2007 10:44PM
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Scolson
Posts: 2904 - Karma: 92
#1 is multiple choice

6/25-7/25i
6/25-17/25i
18/5-17/5i
18/25-17/25i
Jun 7 2007 10:48PM
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mauii
Posts: 6166 - Karma: 32
2)I thought i could solve this system by substituting but i fucked that up.
3x-2y=7
x+4y=7

3(7-4y)-2y=7
21-12y-2y=7
-12y-2y=-14
y=(-14)/(-14)
y=1

x=3
Jun 7 2007 10:50PM
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matty_chaines*
Posts: 177 - Karma: 11
algebra is soo gay
Jun 7 2007 10:51PM
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Scolson
Posts: 2904 - Karma: 92
yeah that's what I did but I messed up and ended up with some crazy assed decimal.


im dum
Jun 7 2007 10:52PM
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zylstra
Posts: 3613 - Karma: 125
*dumb
Jun 7 2007 11:07PM
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Scolson
Posts: 2904 - Karma: 92
yeah that's the symbol. i have no idea if you're right but you obviously know more than me i'll take your word for it
Jun 7 2007 11:07PM
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Gavajabra2
Posts: 1259 - Karma: 13
If its 3-2i/4+3i then just multiply it by the recipricle so: 3-2i/4+3i times 4-3i/4-3i
Jun 7 2007 11:09PM
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mauii
Posts: 6166 - Karma: 32
If thats what he meant, then thats right, except you forgot the -1 after 3/4
Jun 7 2007 11:10PM
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Scolson
Posts: 2904 - Karma: 92
see i told you
Jun 7 2007 11:10PM
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killabees
Posts: 8558 - Karma: 494
who are you!
Jun 7 2007 11:11PM
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Scolson
Posts: 2904 - Karma: 92
thanks for the help so far
Jun 7 2007 11:12PM
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mauii
Posts: 6166 - Karma: 32
I'm mauii
Jun 7 2007 11:14PM
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killabees
Posts: 8558 - Karma: 494
im tykeer, ive enever seen you berfofer>
Jun 7 2007 11:17PM
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M+M
Posts: 7935 - Karma: 25
this is correct, the answer should be....
((3-2i)/(4+3i))((4-3i/4-3i)=(12-9i-8i-6i^2)/(16+9i^2) i think, i did that mostly in my head, could be off
Jun 8 2007 7:51PM
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comeatmebro
Posts: 10720 - Karma: 66
haha idk why but i cant understand math on the computer. with like /=division and shit. and im actually smart too, oh well.
Jun 8 2007 8:09PM
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Jhorski
Posts: 648 - Karma: 45
hell ya man, Calculus all the way
Jun 8 2007 8:18PM
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Scolson
Posts: 2904 - Karma: 92
it's ok guys its over. I was completely blown away about the score ig ot on the test
Jun 8 2007 9:39PM
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Skierguy1234
Posts: 1684 - Karma: 88
1)3-2i/4+3i
mult everything by 4
12-2i+12i
combine like terms
12+10i
i think that right, but im not sure.
Jun 8 2007 10:34PM
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Rooddss
Posts: 1420 - Karma: 14
very easy stuff, f(x) = y and then ill do the rest later haha
Jun 8 2007 10:40PM
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