linear equations! |
 Jun 5 2008, 06:05 PM
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Senior Member  Group: Member Posts: 45 Joined: Feb 2008 Member No: 622,075  |
i need to do this and i don't get it ! i've tried like 100 times! help please!
AB y= -2x + 21 BC y= 1x - 12 CA y=2 a) Choose two of the above equations to form a linear system b) Solve the linear system (substitution method of linear combination method.) c) Show that the point above is on the third line by substituting the coordinates into the equation. thanks :) i'm almost pulling my hair out over this. |
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Jun 5 2008, 09:43 PM
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 [Insert something Witty Here] Group: Member Posts: 363 Joined: Dec 2007 Member No: 598,828 |
A C and B are variables they are substitutes for numbers in algebra
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Jun 5 2008, 09:53 PM
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 in a matter of time Group: Staff Alumni Posts: 7,151 Joined: Aug 2005 Member No: 191,357 |
QUOTE(Katalyzt @ Jun 5 2008, 07:43 PM)  A C and B are variables they are substitutes for numbers in algebra Thanks, I know what variables are.  And she just said that they aren't part of the equation.Michael, I did that, but failed. I don't really think I'm bad at math if I can get through AP Calculus, but this is what happened: 
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Jun 6 2008, 06:50 PM
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 Senior Member Group: Administrator Posts: 2,648 Joined: Apr 2008 Member No: 639,265 |
QUOTE(gigiopolis @ Jun 5 2008, 10:53 PM) Thanks, I know what variables are. And she just said that they aren't part of the equation.Michael, I did that, but failed. I don't really think I'm bad at math if I can get through AP Calculus, but this is what happened: Well, I mean, you can do it using matrices, too, but it works out the same. The problem does say that you have to determine if the equations actually do work, so they might not. But, I dunno; it's not like I have a degree in computer science or anything like that. 
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Posts in this topic
pointeitoutx3 linear equations! Jun 5 2008, 06:05 PM
RockItStudios this and this might help.
I haven't done this... Jun 5 2008, 07:20 PM gigiopolis Are the A's, B's and C's part of the e... Jun 5 2008, 07:59 PM pointeitoutx3 oh. no, they aren't, Jun 5 2008, 09:36 PM mipadi Basically, set two of the equations equal to each ... Jun 5 2008, 09:43 PM fire Are you guys assuming that all three lines interse... Jun 6 2008, 12:12 AM gigiopolis Then the question is screwed up because it clearly... Jun 6 2008, 12:15 AM Just_Dream Yea it's definitely not working. But I don... Jun 6 2008, 03:45 AM RockItStudios i think AB, BC, and CA are the names of the segmen... Jun 6 2008, 10:44 AM Just_Dream ^ But if it makes a triangle, the point (on the li... Jun 6 2008, 04:59 PM SilentLaugh quickmath.com Jun 6 2008, 05:59 PM ArjunaCapulong lol Asians + Michael arguing
I hate linear equati... Jun 6 2008, 06:06 PM
SilentLaugh QUOTE(ArjunaCapulong @ Jun 6 2008, 07:06 ... Jun 8 2008, 05:53 PM moorepocket aw damn, I wanna try this. Jun 6 2008, 08:02 PM pointeitoutx3 omg i am sooo sorry, the third line was x=2. ... Jun 8 2008, 05:50 PM Just_Dream QUOTE(pointeitoutx3 @ Jun 8 2008, 03:50 P... Jun 9 2008, 06:12 PM gigiopolis ^ Yeah, I know right?
Wtf.
Let's just give u... Jun 9 2008, 07:09 PM Just_Dream QUOTE(gigiopolis @ Jun 9 2008, 05:09 PM) ... Jun 11 2008, 11:56 PM |
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