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Math help. http://theexiled.pwnageservers.com/forum/viewtopic.php?f=32&t=864 |
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Author: | TE-Braveskin [ Wed Dec 14, 2005 8:23 pm ] |
Post subject: | Math help. |
this is hard for me. please dont laugh x = 6y y = x+2 x + z = 43 What does Z equal? |
Author: | TE-Noxwizard [ Wed Dec 14, 2005 8:40 pm ] |
Post subject: | |
Systems of Equations. First you need to get everything arranged the same. 0 = -1x + 6y + 0z -2 = 1x - 1y + 0z 43 = 1x + 0y + 1z Now, you need to get some of the terms to cancel out. Let's get rid of the y's first. Multiply the second row by 6. 0 = -1x + 6y + 0z (6) -2 = 1x - 1y + 0z (6) 43 = 1x + 0y + 1z Now it looks like this: 0 = -1x + 6y + 0z -12 = 6x - 6y + 0z 43 = 1x + 0y + 1z Now add the first two rows together. 0 = -1x + 6y + 0z -12 = 6x - 6y + 0z -12 = 5x + 0y +0z Now do the same thing with your new row and the last row. Mulitply the second row by 5, then subtract. -12 = 5x + 0y +0z 43 = 1x + 0y + 1z I'd finish, but I have to go. |
Author: | TE-Hammy [ Wed Dec 14, 2005 8:51 pm ] | ||
Post subject: | |||
o.o umm... u ppl scares me... im in prealgebra
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Author: | TE-Gooberman [ Wed Dec 14, 2005 10:07 pm ] |
Post subject: | |
im in algebra1 (going into geometry next year...hoping for an honors class) and i dont get much of that. and seeing as how my brain is sizzled from my rediculously pointless, boring and tedious science homework, i cant help much. sorry. |
Author: | TE-Krogoth [ Thu Dec 15, 2005 8:31 am ] |
Post subject: | |
Whoa Nox, you made that a lot more complicated than you needed to. If x=6y then plugin x into the second equation to get y=6y+2 then you move the 6y to the other side to get -5y=2 then you divide the y by 5 and get y=-2/5 then plugin y into the first equation to get x, x=6(-2/5) then plugin x into the last equation -12/5+z=43 move the -15 to the other side, and z=43+12/5 So: x=12/5 y=2/5 z=45.2 |
Author: | TE-Hammy [ Thu Dec 15, 2005 9:27 am ] |
Post subject: | |
ya... that o.o |
Author: | -$$-Agent D [ Thu Dec 15, 2005 5:44 pm ] |
Post subject: | |
I learned the same way as nox...... |
Author: | TE-Braveskin [ Thu Dec 15, 2005 11:25 pm ] |
Post subject: | |
Thanks for your help. But My homework was due ealier today and I just kinda guessed. lol, thanks anyways. |
Author: | TE-Hammy [ Fri Dec 16, 2005 3:01 pm ] |
Post subject: | |
i bet they feel used .-. lol jk |
Author: | TE-Braveskin [ Fri Dec 16, 2005 5:32 pm ] |
Post subject: | |
I have a feeling they are working us too hard in 7th grade math. Yes, that is for my 7th grade math class. |
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