Questions on Algebra: Matrices, determinant, Cramer rule answered by real tutors!

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Algebra: Matrices, determinant, Cramer rule

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Question 174936: Please help me solve this equations:
Click here to see answer by checkley75(3666)

Question 174937: Please help me solve this equations:
Click here to see answer by Alan3354(6079)

Question 175039: find inverse of the matrix and also verify your result.
1 -2
3 4
Click here to see answer by Mathtut(3670)

Question 175157: how do you name a matrix?
Click here to see answer by Mathtut(3670)

Question 175330: Cramers rule Cant find this problem here
Solve the system of equation using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
Parenthesis 2x+3y=41
2x-3y=-13
A Parenthesis is only in the beginning then the two equations top and bottom..
here are the choices I need
A. x=7,y=9 B. x=-9,y=7 C. x=-7,y=-9 D. x=9,y=7
I think it is B is that correct?
Help
Click here to see answer by KnightOwlTutor(292)

Question 175433: How do I find 4c?
C= [12,0,3over2, 1,-6,7]
Click here to see answer by EMStelley(143)

Question 175433: How do I find 4c?
C= [12,0,3over2, 1,-6,7]
Click here to see answer by Mathtut(3670)

Question 175434: How do I complete the multiplication: 2EA
E= [1,2] A=[3,0,2,-1]
Click here to see answer by Mathtut(3670)

Question 175430: How do I find matrix A + matrix B?
A= [3,0,2,-1] B=[2,8,.6,3]
Click here to see answer by actuary(84)

Question 175429: How do I find the element of a(base 1),(base 2)?
1 2 3
4 5 6
7 8 9
Click here to see answer by Edwin McCravy(2922)

Question 175529: What is the determinant of G?
G= 12 0
-6 2
Click here to see answer by Mathtut(3670)

Question 175529: What is the determinant of G?
G= 12 0
-6 2
Click here to see answer by actuary(84)

Question 175528: How do I find the determinant of A?
A= 4 -7
3 -2
Click here to see answer by actuary(84)

Question 175531: How do I solve the system of equations using the Gauss-Jordan elimination?
3x+5y=7
6x-y=-8
Click here to see answer by stanbon(26268)

Question 175531: How do I solve the system of equations using the Gauss-Jordan elimination?
3x+5y=7
6x-y=-8
Click here to see answer by Mathtut(3670)

Question 175530: How do I find the determinant of K?
K= 14 -13 0
3 8 -1
-10 -2 5
Click here to see answer by jim_thompson5910(13787)

Question 175527: How do i find BA?
B= 2 8 A= 3 0
.6 3 2 -1
Click here to see answer by Mathtut(3670)

Question 175559This question is from textbook algebra 2

: This question is from textbook algebra 2

Click here to see answer by Mathtut(3670)

Question 175431: How do I find B-CF?
B= [2,8,.6,3] C=[12,0,1.5,1,-6,7] F=[-2,0,0,8,2,1]
Click here to see answer by Fombitz(2113)

Question 175335: How ould yu solve this? I understand the 2x2 matrice but this one is different
no tin the book
Perform the indicated operation, whenever possible
[-9 7] [-5 -1] [-2 -2]
8 -9 + 2 2 - -4 -4
I this problem they have [ for th two lines in each box and then + then [ then minus [
I hope you understand..Cant find the [ bigg enough to do the boxes in each 2x2 matrice..
my answer of choice is:
A. -16 4 B. -12 8 c. -2 10 d. -6 6
6 -11 14 -3 10 -7 2 -15
I hope you understand...I think it is C.
Click here to see answer by Fombitz(2113)

Question 175886: Find the inverse of each matrix if it exists. If it does not exist, write
no inverse.
1. [6 2]
[3 2]

2. [1 2 3]
[2 2 1]
[1 1 1]

3. [7 8]
[-14 -16]

4. [4 4 8]
[3 2 6]
[2 1 4]

Click here to see answer by jim_thompson5910(13787)

Question 175882: What are the dimensions of the product of a 2 x 3 matrix and a
3 x 4 matrix?

You bought ten carnations and five daisies for a total of $12.50. Later
that day you bought five carnations and eight daisies for a total of
$11.75. Find the price of each carnation and of each daisy.
Click here to see answer by stanbon(26268)

Question 175934: find the coefficient matrix and evalute its determinant.
9x-2y=15
3x+2y=5
Click here to see answer by stanbon(26268)

Question 175934: find the coefficient matrix and evalute its determinant.
9x-2y=15
3x+2y=5
Click here to see answer by jim_thompson5910(13787)

Question 176018This question is from textbook Algebra 2
: Can you help me solve the matrix equation.
This question is from textbook Algebra 2

Click here to see answer by Mathtut(3670)

Question 176018This question is from textbook Algebra 2
: Can you help me solve the matrix equation.
This question is from textbook Algebra 2

Click here to see answer by jim_thompson5910(13787)

Question 176018This question is from textbook Algebra 2
: Can you help me solve the matrix equation.
This question is from textbook Algebra 2

Click here to see answer by Edwin McCravy(2922)

Question 176026This question is from textbook Algebra 2
: How do you solve this matrix equation?
[-7 -9] X [3 4] = [1 9]
[4 5] + [4 -3] = [6 -6]This question is from textbook Algebra 2

Click here to see answer by stanbon(26268)

Question 175884: Write two 2 x 2 matrices A and B. Show that multiplication of
matrices is not commutative.
Click here to see answer by Mathtut(3670)

Question 176155: Are these matrices inverses of each other? Show why or why not.

[2 -1]
[-3 1]

[-1 -1]
[-3 -2]
Click here to see answer by Fombitz(2113)

Question 176153: You bought ten carnations and five daisies for a total of $12.50. Later
that day you bought five carnations and eight daisies for a total of
$11.75. Find the price of each carnation and of each daisy.

What are the dimensions of the product of a 2 x 3 matrix and a
3 x 4 matrix?
Click here to see answer by Fombitz(2113)

Question 176049: 5x+2y=8
2x-3y=7
Click here to see answer by EMStelley(143)

Question 176407: 4-3m=n
2m+2n=3
[6x-12=-3x-21]
[3y+6=8y-5]
[-2x 22 -3z]=[6x -2y 45]
Click here to see answer by Mathtut(3670)

Question 176528: how do I solve the equation by multiplying: AB A=(3, 0, 2, -1) B=(2, 8, .6, 3)
Click here to see answer by heidi_dommer(1)

Question 176528: how do I solve the equation by multiplying: AB A=(3, 0, 2, -1) B=(2, 8, .6, 3)
Click here to see answer by jim_thompson5910(13787)

Question 176532: How do i find the determinant of A: A=[4, -7, 3, -2]?
Click here to see answer by stanbon(26268)

Question 176532: How do i find the determinant of A: A=[4, -7, 3, -2]?
Click here to see answer by jim_thompson5910(13787)

Question 176531: What is BA: B=[2, 8, .6, 3] A=[3, 0, 2, -1]
Click here to see answer by stanbon(26268)

Question 176531: What is BA: B=[2, 8, .6, 3] A=[3, 0, 2, -1]
Click here to see answer by jim_thompson5910(13787)

Question 176534: how do I solve the system of equations: x-2y=5 -3x+2y=7?
Click here to see answer by EMStelley(143)

Question 176533: please help, if I use the gauss-jordan elimination to solve the equation, how do i find the answer: 3x+5y=7 6x-y=-8?
Click here to see answer by jim_thompson5910(13787)

Question 176529: How do I multiply: 2EA E=[1, 2] a=[3, 0, 2, -1]
Click here to see answer by Mathtut(3670)

Question 176596: How do i find the determinant of K: K= 14 -13 0
3 8 -1
-10 -2 5
Click here to see answer by Fombitz(2113)

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