anonymous
  • anonymous
15. x+y+z-6=0 2x-3y+4z-3=0 4x-8y+4z-12=0 17.w+x+y+z=0 2w+x-y-z=1 -w-x+y+z=o 2x+y=o
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
amistre64
  • amistre64
1 1 1 = 6 2 -3 4 = 3 4 -8 4 = 12 1 1 1 = 6 (-2) -2 -2 -2 =-12 2 -3 4 = 3 2 -3 4 = 3 ------------- 0 -5 2 = -9 .......................................................... 1 1 1 = 6 (*-4) -4 -4 -4 = -24 4 -8 4 = 12 4 -8 4 = 12 -------------- 0 -12 0 = -12 (/-12) 0 1 0 = 1 ......................................................... 0 -5 2 = -9 0 -5 2 = -9 0 1 0 = 1 (5) 0 5 0 = 5 -------------- 0 0 2 = -4 (/2) 0 0 1 = -2
amistre64
  • amistre64
1 1 1 = 6 0 1 0 = 1 0 0 1 = -2 1 1 -2 = 6 1 0 0 = 6-1+2 x y z =# --------- 1 0 0 = 7 0 1 0 = 1 0 0 1 = -2
amistre64
  • amistre64
1 1 1 1 = 0 2 1 -1 -1 = 1 -1 -1 1 1 = 0 2 1 0 0 = 0 1 1 1 1 = 0 -1 -1 1 1 = 0 (add em up, they are good to go) --------------- 0 0 2 2 = 0 .............................................................. 1 1 1 1 = 0 (*-2) -2 -2 -2 -2 = 0 2 1 -1 -1 = 1 2 1 -1 -1 = 1 --------------- 0 -1 0 -3 = 1 .................................................................. 1 1 1 1 = 0 (*-2) -2 -2 -2 -2 = 0 2 1 0 0 = 0 2 1 0 0 = 0 --------------- 0 -1 -2 -2 = 0 ............................................................... 1 1 1 1 = 0 0 -1 0 -3 = 1 (*-1) 0 1 0 3 = -1 0 -1 0 -3 = 1 0 -1 -2 -2 = 0 ............................................................... 0 1 0 3 = -1 0 -1 0 -3 = 1 -------------- 0 0 0 0 = 0 this is a sign for infinity solutions ........................................... 0 1 0 3 = -1 0 -1 -2 -2 = 0 ----------------- 0 0 -2 1 = -1

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amistre64
  • amistre64
1 1 1 1 = 0 0 1 0 3 = -1 0 0 -2 1 = -1 (/-2) 0 0 1 -1/2 = 1/2 0 0 0 0 = 0 ................................................ 1 1 1 1 = 0 0 1 0 3 = -1 0 0 1 -1/2 = 1/2 0 0 0 0 = 0
amistre64
  • amistre64
w+x+y+z=0 2w+x-y-z=1 -w-x+y+z=0 y = -2x ------------------- w-x+z=0 w = x-z 2(x-z)+3x-z=1 -- 2x-2z+3x-z = 1 -(x-z)-3x+z=0 -- -x +z -3x+z = 0 ..................................... 5x -3z = 1 -4x +2z = 0 -- z = 2x 5x -2x = 1 3x = 1 x = 1/3 z = 2(1/3) = 2/3 w = x-z = 1/3 - 2/3 = -1/3 y = -2x = -2(1/3) = -2/3
amistre64
  • amistre64
i see the typo in my matrix that goofed me up lol.... -2 -2 -2 -2 = 0 2 1 -1 -1 = 1 --------------- 0 -1 -3 -2 = 1 ^^ i made that a '0' last time :)
anonymous
  • anonymous
was about to say the book says answer is 1, -1, 2, -2
anonymous
  • anonymous
shld i erase up to the mistake?
amistre64
  • amistre64
you could erase it up to that point :)
anonymous
  • anonymous
got it to 1 0 0 0 1 0 1 00 -1 0 0 1 1 0 0 -1 -2 -2 0
anonymous
  • anonymous
YES ALL THE STUFF U TAUGHT ME MAKES SENSE HAHAHA YES 1 SEC WANNA SEE IF I CAN GET TO 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0
anonymous
  • anonymous
sry caps
amistre64
  • amistre64
lol....little excited eh :)
anonymous
  • anonymous
well i was then i forgot wtf went thru my brain can get to 1 0 0 0 1 0 1 0 0 -1 0 0 1 1 0 0 -1 -2 -2 0
anonymous
  • anonymous
what shld i do now?
amistre64
  • amistre64
0 0 1 1 = 0 0 -1 -2 -2 = 0 switch these 2 rows 1 0 0 0 = 1 0 1 0 0 = -1 0 -1 -2 -2 = 0 (*1) 0 0 1 1 = 0
amistre64
  • amistre64
or subtract it from the R2
anonymous
  • anonymous
oh didnt know i could swap rows
amistre64
  • amistre64
0 1 0 0 =-1 0-1-2-2= 0 ------------- 0 0 2 2 =-1 (/2) 0 0 1 1 = -1/2 .....maybe?
amistre64
  • amistre64
matrix can be cumbersome.....
anonymous
  • anonymous
nah cause the answers are 1, -1 2, -2
anonymous
  • anonymous
and thats and understatement
amistre64
  • amistre64
-2 -2 -2 -2 = 0 2 1 -1 -1 = 1 --------------- 0 -1 -3 -3 = 1 (*1) 0 1 3 3 = 1 ..............................
anonymous
  • anonymous
wait how does that work cause if you times whole line by -1 to make them positives it makes the 1 -1 right?
amistre64
  • amistre64
1 1 1 1 = 0 0 1 3 3 = 1 0 1 3 3 = 1 0 -1 -2 -2 = 0 0 -1 -2 -2 = 0 0 0 2 2 = 0 -------------- 0 0 -1 -1 =1 (-1) 0 0 1 1 = -1 .......................................................... 0 1 3 3 = 1 0 0 2 2 = 0 ------------- 0 1 5 5 = 1
anonymous
  • anonymous
wait im confused if ur adding 0 1 3 3 1 to 0 -1 -2 -2 0 wouldnt it be 0 0 1 1 1? then when times by -1 0 0 -1 -1 -1?
amistre64
  • amistre64
1 1 1 1 = 0 0 1 3 3 = 1 0 0 1 1 = -1 ...cant seem to wrap this up lol
amistre64
  • amistre64
im gonna write this on paper; its a nightmare trying to keep things sorted in this reply box lol
anonymous
  • anonymous
OMFG WE FAILED SO HARD AHHAHAHHAHA
anonymous
  • anonymous
4rth row is not 2 1 0 0 y is third in all the others so wouldnt it be 2 0 1 0
anonymous
  • anonymous
sry 0 2 1 0
amistre64
  • amistre64
lol...your right
anonymous
  • anonymous
always goes w x y z we have x and y
anonymous
  • anonymous
haha if only i could fit all of this onto failblog or unfreindable
amistre64
  • amistre64
1 1 1 1 =0 2 1 -1-1 =1 -1 -1 1 1 =0 0 2 1 0 =0 lol yeah :)
anonymous
  • anonymous
dear god getting a drink and cranking this out hey btw meant to ask you earleir are you a teacher or what do you do?
amistre64
  • amistre64
im an unemployed carpenter going back to college :)
anonymous
  • anonymous
well congratz on going back my brother is going back soon too and my other brother is just about to finish at the community but im going into the navy already signed why i have to get this stuff done
amistre64
  • amistre64
1 1 11=0 -1-111=0 ---------- 0 0 2 2 = 0 -2-2-2-2=0 2 1 -1-1=1 ------------ 0-1-3-3=1 -2-2-2-2=0 0 2 1 0 =0 ------------ -2 0-1-2=0
amistre64
  • amistre64
1 1 1 1 = 0 0 1 3 3 =-1 0 0 1 1 =0 -2 0-1-2=0
anonymous
  • anonymous
R1 times 2 add to R4 and swap R4 and R3?
amistre64
  • amistre64
pawn to queen3 lol
anonymous
  • anonymous
rofl nvm
amistre64
  • amistre64
2 2 2 2=0 -20-1-2=0 ----------- 0 2 1 0 = 0 ....cant hurt lol
anonymous
  • anonymous
oh times R3 by -3 add to R2?
anonymous
  • anonymous
hahah like an undobutton
amistre64
  • amistre64
0 1 3 3 =-1 (*-2) 0 2 1 0 = 0 0-2-6-6 =2 0 2 1 0 =0 ----------- 0 0 -5 -6 = 2
amistre64
  • amistre64
0 0 1 1 =0 (*5) 0 0 -5 -6 = 2 00 5 5=0 00 -5-6 =2 ----------- 0 0 0 -1 = 2 0001=-2
amistre64
  • amistre64
1 1 1 1 = 0 0 1 3 3 =-1 0 0 1 1 = 0 1 -2 = 0; 1 0=2 0 0 0 1 =-2
amistre64
  • amistre64
1 1 1 1 = 0 0 1 3 3 =-1 <-- 0 1 6 -6 = -1 ; 0100=-1 0 0 1 0=2 0 0 0 1 =-2
amistre64
  • amistre64
1 1 1 1 = 0 <- 1 -1 2-2=0; 1000=1 2-2; 1000=1 0 1 0 0 =-1 0 0 1 0 = 2 0 0 0 1 =-2
amistre64
  • amistre64
1 0 0 0 = 1 0 1 0 0 =-1 0 0 1 0 = 2 0 0 0 1 =-2
amistre64
  • amistre64
did you get all that lol
anonymous
  • anonymous
yes thx man for everything is there a way to add you so i cld maybe get future help if need be and ur ok with it?
amistre64
  • amistre64
add me? not that i know of; just come by and if im here say hi :)
amistre64
  • amistre64
do i deserve a medal :) lol
anonymous
  • anonymous
i gave you one long time ago
anonymous
  • anonymous
oh sweet can give you another
amistre64
  • amistre64
true ;)
amistre64
  • amistre64
yay lol..... thanx :)
anonymous
  • anonymous
nah man thank you for everything i beat my head agianst this and i just couldnt make it come together in a way that made sense you showed me how to do it even tho my PAID teachers cldnt i honestly cld have failed if not for this then there wld be no navy nuclear school or graduation
amistre64
  • amistre64
good luck :)

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