solve linear system; evaluate determinant; etc

jjen1978

New member
Joined
May 22, 2006
Messages
6
I need help solving these questions. I am so lost with these last questions that I need to do. Does anyone no how to do them or help me start them.

1)
x - y + z = -11
x + y + z = -5
x + y - z = 1


2) Evaluate the determinant
1/8 1/7
-5/9 5/6

3) Use cramers rule

11x + 3y = 1
5x + 2y = 4

4) Evaluate the determinant
6 5 6
1 1 3
2 5 1

5) Use cramer's rule

4x + 3y - z = 12
x - 3y + 3z = 14
3x + y + z = 18

Please help me figure these out or give me an idea of how to do these.
 
Are you saying that you are not familiar with Cramer's Rule, finding determinants, or solving linear systems of equations?

Please clarify your question. Thank you.

Eliz.
 
no idea

I have been trying to figure out all the question and I have not got any where so far. I have been looking for the cramer's rule and finding determinants.
 
jjen1978, do you realize that you are asking us to do for you a basic tutorial in linear algebra. That is a enormous task. There are as many ways to approach these problems as there are tutors to reply.
Can you narrow your questions?
Do you need help in determinants?
Do you want to find inverses of matrices?
Do you want to know how to use inverses to solve systems of equations.

Any one of those is quite a tutorial!
 
To other Tutors:
Does this thread appear to have been a ‘phishing’ expedition?
What is to be made of that sudden turn-around?
 
pka said:
To other Tutors:
Does this thread appear to have been a ‘phishing’ expedition?
What is to be made of that sudden turn-around?
Your suspicions seem very reasonable to me. I can think of little other way of explaining the apparent sequence of events.

Eliz.
 
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