row operations and graph for no solution and infinite

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therese478

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Aug 28, 2008
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no solution y + 1 =2x 2x - y= 0 3 -1 2 -1 this is what I know so far
y - 1 =2x 4x - 2y=1 2 3 0 1

Infinite 2y= x - 1 x - y =2 this is what I know so far
3x= 6y + 3 -2 + 2y= 4

For both I need to show row opertions to show no unique solution for (1) and the second why an infinite number of solutions. and be able to show each of them in a graph program on this part here how would I put it in where it says f(x)=

I do know for the (1) that it will be parellel lines
and for (2) it will show line on top of line or identical.
 
therese478 said:
Code: 
no solution 
                 y + 1 =2x          2x - y = 0     3 -1    2 -1   this is what I know so far
                 y - 1 =2x           4x - 2y = 1   2 3     0  1

Infinite        2y = x - 1            x - y = 2                     this is what I know so far
                3x = 6y + 3          -2 + 2y = 4
For both I need to show row opertions to show no unique solution for (1) and the second why an infinite number of solutions. and be able to show each of them in a graph program on this part here how would I put it in where it says f(x)=

I do know for the (1) that it will be parellel lines
and for (2) it will show line on top of line or identical.
Click to expand...

Looks like you are posting several problems togaether - and I cannot separate those properly.

Can you please distinctly separate the probelms and your work (how did you get those numbers?)?

Thanks
 
I am sorry this is how it is on assignment first no solution
y + 1 = 2x
y - 1 =2x

For this one I need to show row operation to show why it has no solution.
Then I have to be able to show in my graph program what it will look like.
I know when I would put it in it will have parallel lines because it has no solution.

I have to show row operation and then put it in graph.
 
the second one is an infinite

2y= x - 1
3x= 6x + 3

Need to show row operation on why it is infinite because the system is undetermined.
Then I need to graph in program that it is infinite which I know the lines will be on top of each other
How would I put it in the program to show the graph.
 
therese478 said:
I am sorry this is how it is on assignment first no solution
y + 1 = 2x
y - 1 =2x

For this one I need to show row operation to show why it has no solution.
Then I have to be able to show in my graph program what it will look like.
I know when I would put it in it will have parallel lines because it has no solution.

I have to show row operation and then put it in graph.
Click to expand...

Okay now show us the augmented matrix and the proposed row operations (to solve for x and y).
 
therese478 said:
the second one is an infinite

2y= x - 1
3x= 6x + 3 <<<< This is not correct - review your problem and correct it

Need to show row operation on why it is infinite because the system is undetermined.
Then I need to graph in program that it is infinite which I know the lines will be on top of each other
How would I put it in the program to show the graph.
Click to expand...

Now - after correction - show us the augmented matrix and the proposed row operations (to solve for x and y).
 
y + 1 = 2x 2x - y = 0 3 -1 2 -1
y - 1 = 2x 4x - 2y = 1 2 3 0 1
This is all I know on this one

_______________________________________________________________________________________

2y = x - 1x x - y= 2

3x = 6x + 3 -2 + 2y= -4



Does this help. I really do not know what to do.
 
therese478 said:
y + 1 = 2x 2x - y = 0 3 -1 2 -1
y - 1 = 2x 4x - 2y = 1 2 3 0 1
This is all I know on this one

_______________________________________________________________________________________

2y = x - 1x x - y= 2

3x = 6x + 3 <<< You did not fix this one -2 + 2y= -4



Does this help. I really do not know what to do.
Click to expand...

Do you know what an augmented matrix is?

If not then look up in your textbook or review at:

http://www.purplemath.com/modules/matrices.htm

Then tell us what type of row operations you have been taught - to solve for 'x' and 'y'?


Okay now show us the augmented matrix and the proposed row operations (to solve for x and y).


Okay now show us the augmented matrix and the proposed row operations (to solve for x and y).
 
therese478 said:
x - y = 2
-2 +2y= -4
Click to expand...

Please tell me what you are doing here?

Have you learnt about augmanted matirx?

Have you learned about solution of "systems of linear equations" through row operations?
 
I sorry i know what I did wrong now I had to problems which around on my homework sheet and that is why I could not work it out right. Thank you for all the trouble I put you though
 
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