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Tutors Answer Your Questions about Matrices-and-determiminant (FREE)
Question 985264: Forgive me for asking this again, but I was misunderstood and unclear in typing the question the last time. When I typed a_(base)1,2 I meant 1,2 not 12. Sorry.
The question goes as follows:
Given the matrix:
[4 0 -2
-1 -2 3
8 5 1]
What is a_(base)1,2?
Thank you very much.
Click here to see answer by ikleyn(52754)   |
Question 985498: Please help me with this multiple choice matrix question:
While using the Gaussian method you get [0 0 0 5] as a row in your augmented matrix. What can you conclude about the system of equations you are dealing with?
The system is:
a) solvable , b) inconsistent , c) dependent
Thank you.
Click here to see answer by solver91311(24713)  |
Question 985498: Please help me with this multiple choice matrix question:
While using the Gaussian method you get [0 0 0 5] as a row in your augmented matrix. What can you conclude about the system of equations you are dealing with?
The system is:
a) solvable , b) inconsistent , c) dependent
Thank you.
Click here to see answer by ikleyn(52754) |
Question 985526: This question was quite difficult to type up so forgive me if it seems confusing, and I only put the multiple periods in between the letters and underneath the numbers so the matrices would be whole and not in pieces.
Given matrices:
A: [3]
B:[2 9]
C: [2 4 -3
....-2 3 0]
D: [ 3 2
......3 2
......3 2]
E: [-8 -2
......0 0]
F: [ 2 3 4 5 6 7 9]
G:
[3
2
1
0
9
8
7]
Which matrices can be multiplied by A on the right?
Thank you kindly in advanced for your help and time.
Click here to see answer by stanbon(75887) |
Question 985516: This is the second part to my first question.
a) While using the Gaussian method you get [0 0 0 5] as a row in your augmented matrix. What can you conclude about the system of equations you are dealing with?
b) What if you get [0 0 0 0] as a row?
The system is:
a) solvable , b) inconsistent , c) dependent
Thank you.
Click here to see answer by jim_thompson5910(35256) |
Question 985683: This is the second part of my first question:
(I put multiple periods in between the letters and numbers so that the matrices would be whole.)
Given matrices:
A: [3]
B:[2 9]
C: [2 4 -3
....-2 3 0]
D: [ 3 2
......3 2
......3 2]
E: [-8 -2
......0 0]
F: [ 2 3 4 5 6 7 9]
G:
[3
2
1
0
9
8
7]
Which matrices can be multiplied by A on the right?
(Enter the uppercase letters corresponding to the correct answer.)
Thank you.
Click here to see answer by Edwin McCravy(20054)  |
Question 985689: Forgive me, but I forgot to ask which of these matrices can be self-multiplied?
Given matrices:
A: [3]
B:[2 9]
C: [2 4 -3
....-2 3 0]
D: [ 3 2
......3 2
......3 2]
E: [-8 -2
......0 0]
F: [ 2 3 4 5 6 7 9]
G:
[3
2
1
0
9
8
7]
Thank you in advanced for your help and time.
Click here to see answer by Edwin McCravy(20054) |
Question 985695: Given:
[2 6 ... [4 -6 ... [2 6
1 3] * -1 3] = 1 3]
Is [4 -6 an identity matrix?
...-1 3]
(I hope this is not confusing. It is read as (2 6 1 3) in a 2x2 matrix times (4 -6 -1 3) in a 2x2 matrix)
Thank you.
Click here to see answer by ikleyn(52754) |
Question 985883: I'm sorry for asking this question once again, but the way I typed up the question did not properly explain that it was written as m_2,2 not m_22.
Find m_(base)2,2 of the matrix:
[ 3 2 7
1 -2 4
5 3 -1]
Thank you kindly for your help and time.
Click here to see answer by ikleyn(52754) |
Question 985524: This question was quite difficult to type up so forgive me if it seems confusing, and I only put the multiple periods in between the letters and underneath the numbers so the matrices would be whole and not in pieces.
Given matrices:
A: [3]
B:[2 9]
C: [2 4 -3
....-2 3 0]
D: [ 3 2
......3 2
......3 2]
E: [-8 -2
......0 0]
F: [ 2 3 4 5 6 7 9]
G:
[3
2
1
0
9
8
7]
Which matrices can be multiplied by A on the right?
Thank you kindly in advanced for your help and time.
Click here to see answer by Fombitz(32388)  |
Question 990677: State whether the following sets of data are possible for the matrix
equation AX = B. If possible, describe the solution set. That is, tell whether there exists a unique solution, no solution or infinitely many solutions. Here, [A|B] denotes the augmented matrix.
A is a 4 × 2 matrix, rank (A) = 4 and rank [A|B] = 4.
Click here to see answer by ikleyn(52754) |
Question 990674: Consider the system −5x+2y−z = 0 and −5x−2y−z = 0. Both equations
equal zero and so −5x + 2y − z = −5x − 2y − z which is equivalent to y = 0. Does it follow that x and z can equal anything? Notice that when x = 1, z = −4, and y = 0 are plugged into the equations, the equations do not equal 0. Why?
Click here to see answer by ikleyn(52754) |
Question 990674: Consider the system −5x+2y−z = 0 and −5x−2y−z = 0. Both equations
equal zero and so −5x + 2y − z = −5x − 2y − z which is equivalent to y = 0. Does it follow that x and z can equal anything? Notice that when x = 1, z = −4, and y = 0 are plugged into the equations, the equations do not equal 0. Why?
Click here to see answer by MathTherapy(10549)  |
Question 990678: State whether the following sets of data are possible for the matrix
equation AX = B. If possible, describe the solution set. That is, tell whether there exists a unique solution, no solution or infinitely many solutions. Here, [A|B] denotes the augmented matrix.
A is a 5 × 5 matrix, rank (A) = 4 and rank [A|B] = 5.
Click here to see answer by ikleyn(52754) |
Question 990676: State whether the following sets of data are possible for the matrix
equation AX = B. If possible, describe the solution set. That is, tell whether there exists a unique solution, no solution or infinitely many solutions. Here, [A|B] denotes the augmented matrix.
A is a 3 × 4 matrix, rank (A) = 3 and rank [A|B] = 2.
Click here to see answer by ikleyn(52754) |
Question 990675: State whether the following sets of data are possible for the matrix
equation AX = B. If possible, describe the solution set. That is, tell whether there exists a unique solution, no solution or infinitely many solutions. Here, [A|B] denotes the augmented matrix
A is a 5 × 6 matrix, rank (A) = 4 and rank [A|B] = 4.
Click here to see answer by ikleyn(52754) |
Question 994047: A stadium has 53,000 seats. Seats sell for $25 in Section A, $20 in Section B, and $15 in Section C. The number of seats in Section A equals the total number of seats in Sections B and C. Suppose the stadium takes in 1,134,500 from each sold-out event. How many seats does each section hold?
Click here to see answer by Boreal(15235)  |
Question 994099: A theater has tickets at $6 for adults, $3.50 for students, and $2.50 for children under 12 years old. A total of 278 tickets were sold for one showing with a total revenue of $1300. If the number of adult tickets sold was 10 less than twice the number of students tickets, how many of each type of tickets were sold for the showing?
Click here to see answer by josgarithmetic(39613) |
Question 994099: A theater has tickets at $6 for adults, $3.50 for students, and $2.50 for children under 12 years old. A total of 278 tickets were sold for one showing with a total revenue of $1300. If the number of adult tickets sold was 10 less than twice the number of students tickets, how many of each type of tickets were sold for the showing?
Click here to see answer by stanbon(75887) |
Question 994579: Find all X and Y (in R) so that A*A=A*B
A=[ X, 0
-3, Y]
B=[2, 0
4, Y]
I've tried this:
A*A=[X^2, 0
-3X-3Y, Y^2]
A*B=[2X, 0
-6+4Y, Y^2]
X^2=2X
X^2-2X=0
X*(X-2)=0
X1=0 X2=2
-3X-3Y=-6+4Y
6=7Y
Y1=6/7
Y2=0
Is my solution correct? Thank you!
Click here to see answer by Fombitz(32388) |
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