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Algebra: Matrices, determinant, Cramer rule

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Question 192037This question is from textbook College Algebra with Modeling and Visualization

: Solve the system, if possible
x - 4y + z= 9
3y -2z= -7
-x +z= 0
Worked on these problems for over 3 hours and got nowhere. plase helpThis question is from textbook College Algebra with Modeling and Visualization

Click here to see answer by stanbon(26297)

Question 192037This question is from textbook College Algebra with Modeling and Visualization

Click here to see answer by ankor@dixie-net.com(6693)

Question 193660This question is from textbook
: This question is from textbook

Click here to see answer by Mathtut(3670)

Question 193716: x+3y=12
-6x+2y=-12
Click here to see answer by user_dude2008(716)

Question 193858: i need help on this problem...im preparing for my ap exam but i need some help!
please help me on this
a pizza heated to a temperature of 350 degrees fahrenheit is taken out of an oven and placed in a 75F room at time t=0. the temperature of the pizza is changing at a rate of =-110e^-0.4t degrees fahrenheit per minute. to the nearest degree what is the temperature of the pizza at time t=5?
a)112F
b)119F
c)147F
d)238F
e)335F
Click here to see answer by josmiceli(3013)

Question 194184: What is the solution set of x+y=7 and x-y=1?
Click here to see answer by checkley77(7072)

Question 194183: What is the solution set for x+y+7 and x-y+1?
Click here to see answer by checkley77(7072)

Question 194530: Solve using Cramer's Rule
2x-7y=-4
x-y=3
Click here to see answer by invaderjmg(2)

Question 195513This question is from textbook
: expand by use of minors
3 4 -2
6 4 3
0 4 2This question is from textbook

Click here to see answer by Alan3354(6097)

Question 196183: Hi all, Im having a bit of trouble with Matrix problems at the moment.
Can someone please help me out with the following?
Write this system of equations in matrix form
y + z = 0 ,
−x + y − z = 9 ,
x − z = 4 .
Iwant to try and get a better understanding of the solving in matrix form, so steps in working nd explanations would be really helpful.
Thanks. -Nick
Click here to see answer by anantha(74)

Question 196182: Hi, Nick here, was hoping someone might be able to give me a hand with writing the following system of equations in the matrix form and solve using inverse matrix.
x + 2y = 6 ,
3x + 4y = 2
I also have to solve the system using the elimination procedure and compare the two answers.
Any help would be great. -Nick
Click here to see answer by anantha(74)

Question 197339This question is from textbook
: evaluate the determent
0 0 0 8
4 4 8 1
5 4 1 7
7 5 4 4This question is from textbook

Click here to see answer by solver91311(5072)

Question 196933: What is the complexity to evaluate the Moore-Penrose pseudoinverse of an n x m matrix?
Click here to see answer by solver91311(5072)

Question 197720: 2x-5y=4
5x-7y=-1
solve by using the matrix row reduction method.
I've been trying to work on this problem for hours but I'm stuck. Hopefully you can help me.
Click here to see answer by stanbon(26297)

Question 197935: Hi all, I have a bit of a problem with a Matrices question I'm trying to answer.
I need to find the product of the following matrices:
A=
2 -1 2
-1 2 0
0 0 2
2 0 -3

B=
2 -1 2
1 2 0
0 0 2

I also need to state which of the two products should be taken -A . B or B . A.
Can we sum up and A and B?
Any help would be great.
-Nick
Click here to see answer by stanbon(26297)

Question 197956: I need help im a bit stuck:
Solve the matrix Eqauation:
[9 7] [9 2] =[72 99]
[11 9] X + [4 11] [77 130]
Click here to see answer by stanbon(26297)

Question 198252This question is from textbook Schaum's Outlines College Algebra
: Hello how are you?
Will you please help me with this problem?
This is the Prolem:
Write this matrix in reduced row echelon form.
2 5 3 3
3 2 4 9
5 -3 -2 4
I would love to show you my solution but it's too long to type here. I spent 2 hours on this problem and I consumed five pages of papers. I can scan and e-mail you my solution to this problem if you would like.

You can contact me at 909-910-1872 or e-mail me at agan_som143@msn.com
Thank you so much!
Have a nice day!
Charlyn
This question is from textbook Schaum's Outlines College Algebra

Click here to see answer by stanbon(26297)

Question 195765: Hi, found another Matri problem Im struggling with.
This time I have to write the following system of equations:
x + 2y = 6
3x + 4y = 2
In matrix form and solve using inverse matrix.
Solve using eliminator procedure also and compare the two answers.
Again detailed solutions with explanations would be super helpful.
Thanks again- Nick.
Click here to see answer by arallie(162)

Question 195764: Hi, having trouble with Matrix problems.
This one is troubling me in particular:
I have to write the following system of equations in matrix form:
y + z = 0
- x + y - z = 9
x - z = 4
Proper working an explanations would be great!
Thabks -Nick.
Click here to see answer by arallie(162)

Question 198943: Hi. I am trying to make a determinant problem for someone I am tutoring. I would like something similar to the following problem that requires factoring in the result, the answer to this problem is 5/3 and -1. I am not sure how to reverse a problem to make the answer something similar to this example. Thanks to anyone who can help.
Here is the example I am trying to simulate:
= -3

Click here to see answer by Edwin McCravy(2922)

Question 199607: Hello,
I'm trying to find the inverse of the following matrix; please help. I have to show all my work for homework, but I'm getting confused. Thank you!
(18 9)
(-8 -4)
Click here to see answer by jim_thompson5910(13794)

Question 200366: Hi everyone I asked a similiar question recently but got no responce, I may have input the question incorrectly.
I need to solve the following Matrices and comment on the outcomes.
For the following:
A =
( 1 0 )
0 1
B =
( 2 1 )
3 2
C =
( 1 4 )
3 -1
-2 5

Find and state why or why not the following is possible.
i) AB
ii) B^1
iii) BC^T
Click here to see answer by jim_thompson5910(13794)

Question 200482: Hi everyone I asked a similiar question recently but got no responce, I may have input the question incorrectly.
I need to solve the following Matrices and comment on the outcomes.
For the following:
A =
( 2 -1 1 )
1 1 -2
B =
( 1 -1 )
2 3
C =
( 1 -1 )
0 1
-2 1

Find and state why or why not the following is possible.
i) A^T + C
ii) AB
iii) CB
Click here to see answer by jim_thompson5910(13794)

Question 200660: Hi all I asked a similiar question recently and got a reaaly good response, but this imiliar problem is still giving me trouble.
I need to solve the following Matrices and comment on the outcomes.For the following:
A =
(2 3 0)
1 4 -3
B =
(1 -1 4)
2 3 5
C =
(2 -1)
3 5
Find and state why or why not the following is possible.
i) A+B
ii) C^-1
iii) AB
1v) B^C
Click here to see answer by jim_thompson5910(13794)

Question 200839: What is the inverse of the following matrix
2 -3 0
1 1 -1
2 0 1
Click here to see answer by Alan3354(6097)

Question 201634: [12 7] [-5 6]
[-1 -3]=A B=[14 0]
Click here to see answer by jim_thompson5910(13794)

Question 201860: Can someone please help me with this
Write an augmented matrix for the system of equations.
3x+6y=72
-2x+6y=32
Click here to see answer by jim_thompson5910(13794)

Question 201959: Help Needed;
Perform row operations on the augmented matrix as far as necessary to determine whether the system is independent, dependent, or inconsistent.
x - y + 3z = 11
4x + z = 2
x + 3y + z = -13
A) Dependent
B) Inconsistent
C) Independent

Click here to see answer by jim_thompson5910(13794)

Question 202458: Can anyone help me with these problems please?
1) Use the matrix method to solve:
5x + 3y = 3
2x - 6y = 30
x = ____
y = ____

2) Perform the following operations on matrices.
(4) + (8) = (____)
(7) (2) (____)

3) Perform the following operations on matrices.
(1 8)(7 6) = (___ ___)
(0 7)(7 4) (___ ___)

Thank you in advance for all your help.
~Sarah
Click here to see answer by jim_thompson5910(13794)

Question 203017: I have a Matrix and I have to invert this matrix:
| 3 2 0|
|-3 -4 5|
| 3 1 -1|
Step by step.
Click here to see answer by jsmallt9(594)

Question 204044: Compute the determinant

| 1 2 3 4| | 5 6 7 8| | 9 10 11 12| |13 14 15 16|

I need help with four equations. I can do it with three. Thank you.
Click here to see answer by Edwin McCravy(2922)

Question 204659: Hi all, I was hoping someone could show me how to solve the following for the give matrix;
A =

a) Write the matrix 4A
b) Use matrix multipication to find A^2 = AA
Help on this problem with full working and explanations would be really helpful.
Thnaks, -Nick

Click here to see answer by ichudov(404)

Question 205232: Please help me find 2A*B and 2B*A from the following:
p.s. A and B are matrices
A:
2 3 6
4-2 0
B:
1 0 1
0 1 0
2 1 0
Thank you
Click here to see answer by alicealc(98)

Question 206068: How do you solve a 2 by 2 determinant with fractions?
1/2 1/4
-7/6 6/11

Click here to see answer by nerdybill(2448)

Question 206225: Hi all, I have a Matrix problem that I am not quite sure of how to solve.
For the given matrix A:
(1 2 3)
(2 1 -1)
(2 0 1)
a) Write the matix 4a. (Does this just mean I solve it by multiplying each number by 4?) and
b) Use matrix multiplication to find A^2 = AA.
Any help would be most appreciated.
Thanks, -Nick.
Click here to see answer by Alan3354(6097)

Question 207871: help me please. what is the value of the determinant? (3x3)
|3 6 8|
|2 4 0|
|3 6 8|
Click here to see answer by jim_thompson5910(13794)

Question 207871: help me please. what is the value of the determinant? (3x3)
|3 6 8|
|2 4 0|
|3 6 8|
Click here to see answer by pjalgeb(9)

Question 207870: if two rows of a determinant are interchanged, what is the true of the resulting determinant?
Click here to see answer by Alan3354(6097)

Question 207900: solve this equation.(its a determinant)
|0 0 -1|
|3 x 0| = x^2
|2 0 3|
Click here to see answer by Alan3354(6097)

Question 208177: I have been trying to get this problem right but am having no luck. It needs to be done using the Gauss-Jordan method. Can someobdy help.
x + 3y - 6z = 7
2x - y + 2z = 0
x + y + 2z = -1
Any help would be appreciated.
Thanks.
Click here to see answer by stanbon(26297)

Question 208213: SYSTEM OF 3 EQUATIONS WITH 3 UNKNOWNS

USING CRAMER'S RULE FIND THE SOLUTION SET FOR THE FOLLOWING SYSTEM OF EQUATIONS:
4X -2Y -3Z = 8
5X +3Y -4Z = 4
6X -4Y -5Z = 12
REQUIRED: Find the solution set {(x, y z)} for the system given.
Click here to see answer by pjalgeb(9)

Question 208208: SYSTEM OF 3 EQUATIONS WITH 3 UNKNOWNS

FIND THE SOLUTION SET FOR THE FOLLOWING SYSTEM OF EQUATIONS:
4X -2Y -3Z = 8
5X +3Y -4Z = 4
6X -4Y -5Z = 12
Click here to see answer by pjalgeb(9)

Question 208676This question is from textbook NewSyllabus Mathematics D book 4
: What does the question means, 'find the matrix representing the transformation that maps triangle A onto triangle B'.This question is from textbook NewSyllabus Mathematics D book 4

Click here to see answer by RAY100(1637)

Question 209165: Hi all, I think I know how to do this one, but I just want to make sure.
For the Given Matrix A:
(1 2 3)
(2 1 -1)
(2 0 1)
Use matrix multiplication to find A^2 = AA
Does this mean I just multiply al numbers by themselves? As in First Column First Row * First Column First Row (1*1)? Which is ofcourse equivalent to 1^2.
Please confirm if this is correct or not.
Thnaks, -Nick.
Click here to see answer by Alan3354(6097)

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