Finite Math Help - Toyota Yaris Forums

Black Yaris · 09-05-2007, 08:34 PM

Anyone familiar with the Echelon or GAUSS-JORDAN method of solving a linear system? My textbook sux, poor examples, and my professor's computer is down and she is using the library computer and I do not have a chance to comunicate with her tonight
4x- y+3z=-2
3x+5y- z=15
-2x+y+ 4z=14

there is the first problem... I am stumped.....

joey1320 · 09-05-2007, 10:37 PM

you can check this website http://aspire.cs.uah.edu/textbook/gauss.html

i made it into college calculus but that was 5+ years ago and i have completely forgoten it all. man i gotta hit the textbooks again and sharpen up!

good luck man.

nsmitchell · 09-05-2007, 10:58 PM

Zing - right over my head!

ChinoCharles · 09-05-2007, 11:09 PM

I tried for all of five minutes to figure it out, but it has been a looooong time. Sorry buddy. Don't you have to subtract entire equations from one another? Or solve for one variable and go from there? Something like that.

nsmitchell · 09-05-2007, 11:11 PM

I think Apples have graphical calculators that might be able to digest that stuff...

DMart · 09-05-2007, 11:47 PM

if u have a ti-83 graphing calculator i believe it'll solve it for you if you put it in the matrices

static808 · 09-05-2007, 11:48 PM

alright, if you wanna actually know the steps that i took, here goes:
1) multiply row 1 by 3, row 2 by -4 and row 3 by 6.
2) row 1 + row 2 = new row 2
3) row 1 + row 3 = new row 3
4) multiply row 1 by -23, row 2 by 3, row 3 by 23.
5) row 1 + row 2 = new row 1
6) row 2 + row 3 = new row 3
7) your 3rd row should now look like: 798z = 1596, OR z = 2.
8) solve backwards from there.

repeat this logic for every problem, and you should be peachy keen. i miss this stuff... but i'll gladly give it up to change diapers and raise my kids right...

--B

static808 · 09-06-2007, 12:08 AM

or you can simply use this page:

http://mkaz.com/math/js_lalg3.html

but be forewarned, you still have to learn how to do it. just use the webpage for homework "help"...

--B

Black Yaris · 09-06-2007, 09:48 AM

Quote:

Originally Posted by static808

alright, if you wanna actually know the steps that i took, here goes:
1) multiply row 1 by 3, row 2 by -4 and row 3 by 6.
2) row 1 + row 2 = new row 2
3) row 1 + row 3 = new row 3
4) multiply row 1 by -23, row 2 by 3, row 3 by 23.
5) row 1 + row 2 = new row 1
6) row 2 + row 3 = new row 3
7) your 3rd row should now look like: 798z = 1596, OR z = 2.
8) solve backwards from there.

repeat this logic for every problem, and you should be peachy keen. i miss this stuff... but i'll gladly give it up to change diapers and raise my kids right...

--B

life saver

that sample should be in our book

nqd · 09-06-2007, 09:51 AM

Quote:

Originally Posted by static808

alright, if you wanna actually know the steps that i took, here goes:
1) multiply row 1 by 3, row 2 by -4 and row 3 by 6.
2) row 1 + row 2 = new row 2
3) row 1 + row 3 = new row 3
4) multiply row 1 by -23, row 2 by 3, row 3 by 23.
5) row 1 + row 2 = new row 1
6) row 2 + row 3 = new row 3
7) your 3rd row should now look like: 798z = 1596, OR z = 2.
8) solve backwards from there.

repeat this logic for every problem, and you should be peachy keen. i miss this stuff... but i'll gladly give it up to change diapers and raise my kids right...

--B

dude i can do that in 2 min.....haha yea right!

redyaris · 09-06-2007, 09:57 AM

Quote:

Originally Posted by Black Yaris

Anyone familiar with the Echelon or GAUSS-JORDAN method of solving a linear system? My textbook sux, poor examples, and my professor's computer is down and she is using the library computer and I do not have a chance to comunicate with her tonight
4x- y+3z=-2
3x+5y- z=15
-2x+y+ 4z=14

there is the first problem... I am stumped.....

You can do math? Will wonders never cease.

ChinoCharles · 09-06-2007, 10:09 AM

Quote:

Originally Posted by redyaris

You can do math? Will wonders never cease.

Damn man.

static808 · 09-06-2007, 10:55 AM

Quote:

Originally Posted by Black Yaris

life saver

that sample should be in our book

dude, anytime buddy. remember, at the very beginning you can also switch around the equations (1st with the 3rd, 2nd with the 1st, etc...) without affecting the results. why do this?? to get smaller common multiples, so your numbers arent so huge at the end... good luck!

--B

xed · 09-06-2007, 11:30 AM

42

ChinoCharles · 09-06-2007, 01:37 PM

static808 is the real deal!

sherryberry · 09-06-2007, 09:41 PM

wow.. i am just starting to remember this....... I took AP Calc in high school but uhh i don't want to remember this...

Black Yaris · 09-06-2007, 09:55 PM

I took calc as well, but never learned this

sherryberry · 09-07-2007, 12:02 AM

well we only did like a lil bit of it. i had a teacher who was like... in love with math...

09-05-2007, 08:34 PM	#1
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	Finite Math Help Anyone familiar with the Echelon or GAUSS-JORDAN method of solving a linear system? My textbook sux, poor examples, and my professor's computer is down and she is using the library computer and I do not have a chance to comunicate with her tonight 4x- y+3z=-2 3x+5y- z=15 -2x+y+ 4z=14 there is the first problem... I am stumped..... __________________

09-05-2007, 10:58 PM	#3
nsmitchell View User's Garage Drives: LB-Auto-PWR-ABS-Cruise-Springs Join Date: Aug 2006 Location: Richmond, VA Posts: 1,065	Zing - right over my head! __________________ Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime Get YarAss in gear! RIP - Casey Tatum

09-05-2007, 11:11 PM	#5
nsmitchell View User's Garage Drives: LB-Auto-PWR-ABS-Cruise-Springs Join Date: Aug 2006 Location: Richmond, VA Posts: 1,065	I think Apples have graphical calculators that might be able to digest that stuff... __________________ Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime Get YarAss in gear! RIP - Casey Tatum

09-05-2007, 11:48 PM	#7
static808 Engineer/Artist/House-Dad View User's Garage Drives: 2006 Toyota Sienna XLE Join Date: Aug 2006 Location: California Posts: 419	alright, if you wanna actually know the steps that i took, here goes: 1) multiply row 1 by 3, row 2 by -4 and row 3 by 6. 2) row 1 + row 2 = new row 2 3) row 1 + row 3 = new row 3 4) multiply row 1 by -23, row 2 by 3, row 3 by 23. 5) row 1 + row 2 = new row 1 6) row 2 + row 3 = new row 3 7) your 3rd row should now look like: 798z = 1596, OR z = 2. 8) solve backwards from there. repeat this logic for every problem, and you should be peachy keen. i miss this stuff... but i'll gladly give it up to change diapers and raise my kids right... --B __________________ His: 2006 Toyota Sienna XLE Arctic Frost Pearl, FC Package, 2007 Solara Nav unit, Spoiler, Running Boards & Auto-dimming rear mirror Hers: 2007 Toyota Yaris LB Black Sand Pearl, Auto, Power Package, Side Airbags, VIP security, USDM center armrest, and accessory 7 spoke 15" alloy wheels Last edited by static808; 09-06-2007 at 12:07 AM.

09-06-2007, 12:08 AM	#8
static808 Engineer/Artist/House-Dad View User's Garage Drives: 2006 Toyota Sienna XLE Join Date: Aug 2006 Location: California Posts: 419	or you can simply use this page: http://mkaz.com/math/js_lalg3.html but be forewarned, you still have to learn how to do it. just use the webpage for homework "help"... --B __________________ His: 2006 Toyota Sienna XLE Arctic Frost Pearl, FC Package, 2007 Solara Nav unit, Spoiler, Running Boards & Auto-dimming rear mirror Hers: 2007 Toyota Yaris LB Black Sand Pearl, Auto, Power Package, Side Airbags, VIP security, USDM center armrest, and accessory 7 spoke 15" alloy wheels

09-05-2007, 10:37 PM	#2
joey1320 View User's Garage Drives: Yaris LB Join Date: Mar 2007 Location: Lakewood, Ohio Posts: 538	you can check this website http://aspire.cs.uah.edu/textbook/gauss.html i made it into college calculus but that was 5+ years ago and i have completely forgoten it all. man i gotta hit the textbooks again and sharpen up! good luck man.

09-05-2007, 11:09 PM	#4
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	I tried for all of five minutes to figure it out, but it has been a looooong time. Sorry buddy. Don't you have to subtract entire equations from one another? Or solve for one variable and go from there? Something like that.

09-05-2007, 11:47 PM	#6
DMart same amount of posts lol View User's Garage Drives: 07 Meteorite Metallic LB Join Date: Jun 2007 Location: South GA Posts: 172	if u have a ti-83 graphing calculator i believe it'll solve it for you if you put it in the matrices

09-06-2007, 11:30 AM	#14
xed Drives: '08 Polar White 3dr Join Date: Jun 2007 Location: NC USA Posts: 79	42

09-06-2007, 01:37 PM	#15
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	static808 is the real deal!

09-06-2007, 09:41 PM	#16
sherryberry Drives: 07 Blazing Blue Yaris Join Date: Jun 2007 Location: Illinois Posts: 1,305	wow.. i am just starting to remember this....... I took AP Calc in high school but uhh i don't want to remember this... __________________ Don't Milk the Cat! -Said by me during a game of Cranium.

09-06-2007, 09:55 PM	#17
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	I took calc as well, but never learned this __________________

09-07-2007, 12:02 AM	#18
sherryberry Drives: 07 Blazing Blue Yaris Join Date: Jun 2007 Location: Illinois Posts: 1,305	well we only did like a lil bit of it. i had a teacher who was like... in love with math... __________________ Don't Milk the Cat! -Said by me during a game of Cranium.

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