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

Tutors Answer Your Questions about Matrices-and-determiminant (FREE)

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(32388)

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(32388)

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(35256)

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(75887)

Question 175934: find the coefficient matrix and evalute its determinant.
9x-2y=15
3x+2y=5
Click here to see answer by stanbon(75887)

Question 175934: find the coefficient matrix and evalute its determinant.
9x-2y=15
3x+2y=5
Click here to see answer by jim_thompson5910(35256)

Question 176018: Can you help me solve the matrix equation.

Click here to see answer by Mathtut(3670)

Question 176018: Can you help me solve the matrix equation.

Click here to see answer by jim_thompson5910(35256)

Question 176018: Can you help me solve the matrix equation.

Click here to see answer by Edwin McCravy(20054)

Question 176026: How do you solve this matrix equation?
[-7 -9] X [3 4] = [1 9]
[4 5] + [4 -3] = [6 -6]
Click here to see answer by stanbon(75887)

Question 176026: How do you solve this matrix equation?
[-7 -9] X [3 4] = [1 9]
[4 5] + [4 -3] = [6 -6]
Click here to see answer by jim_thompson5910(35256)

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(32388)

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(32388)

Question 176049: 5x+2y=8
2x-3y=7
Click here to see answer by EMStelley(208)

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(35256)

Question 176532: How do i find the determinant of A: A=[4, -7, 3, -2]?
Click here to see answer by stanbon(75887)

Question 176532: How do i find the determinant of A: A=[4, -7, 3, -2]?
Click here to see answer by jim_thompson5910(35256)

Question 176531: What is BA: B=[2, 8, .6, 3] A=[3, 0, 2, -1]
Click here to see answer by stanbon(75887)

Question 176531: What is BA: B=[2, 8, .6, 3] A=[3, 0, 2, -1]
Click here to see answer by jim_thompson5910(35256)

Question 176534: how do I solve the system of equations: x-2y=5 -3x+2y=7?
Click here to see answer by EMStelley(208)

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(35256)

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(32388)

Question 176594: How do I find the determinant of A: A= 4 -7
3 -2
Click here to see answer by Fombitz(32388)

Question 176600: If I use the Cramers rule to solve the equation, how do I solve the problem?
5x+3y=7
4x+5y=3
Click here to see answer by Mathtut(3670)

Question 176598: I need help solving this equation that I've been tryin to solve for a while now. can someone please help?
If you were to use the Gauss-Jordan elimination on the following linear system, what would the augmented matix be?
3w-x=2y+z-4
9x-y+z=10
4w+3y-z=7
12x+17=2y-z+6?
Click here to see answer by Mathtut(3670)

Question 176637: Solve the system using an augmented matrix. can you please shoe me the steps for doing this. thank you.
5x + 4y - z = 1
2x - 2y + z = 1
2x - y + z = 2
Click here to see answer by jim_thompson5910(35256)

Question 176599: How do I solve the system of equations?
x+2y-6=z
3y-2z=7
4+3x=2y-5z
Click here to see answer by gonzo(654)

Question 176914: Solve this system using Cramer's rule

Click here to see answer by stanbon(75887)

Question 176914: Solve this system using Cramer's rule

Click here to see answer by Edwin McCravy(20054)

Question 177030: Hello!
How do I solve this determinant problem.
I know the answer is 5/3 , -1 but am not sure how?
Thanks for any help.
Solve

for x.
Click here to see answer by jim_thompson5910(35256)

Question 177030: Hello!
How do I solve this determinant problem.
I know the answer is 5/3 , -1 but am not sure how?
Thanks for any help.
Solve

for x.
Click here to see answer by Edwin McCravy(20054)

Question 177717: Find each product if possible. If not possible, write product undefined.

4. [2 1]
[3 0] [2 4]
[7 4] [1 6]

5. -3 [3 10]
[21 24]

6. [9 15 6]
[-8 2 7] [2 4 0]
[63 -8 1] [-5 0 8]

7. [3 2] [0 1]
[0 0] [4 0]

Click here to see answer by Mathtut(3670)

Question 177722: Find the determinant of each matrix. i cant find how to do this in my book. so please write the steps with answers. thank you

[-6 -7]
[5 8]

[1 -5]
[-2 9]

[1 2 3]
[6 0 5]
[0 4 0]
Click here to see answer by stanbon(75887)

Question 177719: 8. (traingle)ABC has coordinates (1, 1), (3, 4), and (0, -5). Write the vertices in
matrix form.
a. Find the coordinates of the image of the triangle after a dilation of
size .
b. Find the coordinates of the image of the triangle after a translation
right 3 units and up 2 units.
c. Find the coordinates of the image of the triangle after a rotation
of 1808.
d. Find the coordinates of the image of the triangle after a reflection in
the line y = x.
Click here to see answer by Mathtut(3670)

Question 177718: 8. nABC has coordinates (1, 1), (3, 4), and (0, -5). Write the vertices in
matrix form.
a. Find the coordinates of the image of the triangle after a dilation of
size .
b. Find the coordinates of the image of the triangle after a translation
right 3 units and up 2 units.
c. Find the coordinates of the image of the triangle after a rotation
of 1808.
d. Find the coordinates of the image of the triangle after a reflection in
the line y = x.
Click here to see answer by Mathtut(3670)

Question 177938: please solve each matriz..

1. [3 4] [3]
[-1 -1]x=[2]

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

3. x+[1 3 6] [8 1 0]
[-1 2 1]= [14 3 -1]

4. [-3 -2] [8 -1]
[1 1] x=[6 0]

5. 4x+3 [3 2] [10 8]
[1 -2]= [5 -2]

6. 2x=1/4[-6 2]
[8 -8]
Click here to see answer by Mathtut(3670)

Question 178109: Find a quadratic function in standard form for each set of points.

(0, 3), (1, �4), (2, �9)

(0 , �4), (1, 0), (2, 2)

Click here to see answer by solver91311(24713)

Question 178362: Write an augmented matrix for each system of equations. Then solve each system.
(i) 2m + 4n = 3
5m-3n = 6
(ii) 12x-y+12z=6
2x+y-2z=-4
9x+2y+3z=3
Click here to see answer by Edwin McCravy(20054)

Question 178636: HOW DO YOU SOLVE THIS PROBLEM
Y=(X-1)(X+2) I DONT GET THE STEPS IS IT GCF OR WHAT IM TOTALLY LOST
Click here to see answer by josmiceli(19441)

Question 179208: How many ounces in 2 tons?
Click here to see answer by Mathtut(3670)

Question 181023: Solve the system of equations using substitution.
6x + y = 11
-6x -8y = -14
-----------------------------
The solution is _____
(Type an ordered pair. Type N if there is no solution. Type I if there are infinitely many solutions.)
Click here to see answer by ankor@dixie-net.com(22740)

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