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

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

Question 567612: sum of two consecutive odd integers is 36.find them
Click here to see answer by stanbon(57953)

Question 568945: whta is the determinant of
2 3
3 2

Click here to see answer by bucky(2189)

Question 568986: Crammer's Rule? Please help!
1) x+2y=2
3x + y = 3
2) 3x - y = -2
x+ 2y = 4
3) x+ 3y =2
3x - y = -3
4) 2x - y = -2
x+y = - 1
5) 2x - y = -3
x + 2y = 4
Thank you so much!
Click here to see answer by Theo(3504)

Question 570183: Can't solve this determinant
2 5 0 4
1 -2 0 2
3 -1 1 6
4 0 3 -2
Click here to see answer by richard1234(5390)

Question 570370: Using the Gauss/Jordan method to solve the system, writing all row operations between the affected matrices, using the format: rn + k x rm = Rn The system is: x-2y+z=6
2x+y-3z=-3
x-3y+3z=10

Click here to see answer by Edwin McCravy(8999)

Question 574590: 2x-3y+z=2
x-5y+5z=3
3x+y=3z=5
This is a matrices problem
I am having difficutl solving it. I need help.
Thank You
Leticia
Click here to see answer by stanbon(57953)

Question 575619: I'm having problems turning this into a into a matrix

x + 4y - z = 7
x+y+z=2
-2x - 2y + 2z = -8
Click here to see answer by Alan3354(31505)

Question 576307: I'm having problems with this.
Use Cramer's rule to solve the
following system of equations.
If D = 0, use another method
to solve.

2x/3-5y/2=3/2
-x/4+5y/2=7/2

Click here to see answer by solver91311(17070)

Question 576372: {{please help}}how can i solve this..
Click here to see answer by Alan3354(31505)

Question 580941: I am trying to help my niece with her Algebra and both of us our totally stumped. Here is the example of the problems we are working. Can you please review and tell me how you got the answer?
2z squared + 3Z =135
Thank you for your assistance.
I do appreciate it!
Jamie Harrelson
Click here to see answer by Alan3354(31505)

Question 582463: Please help. Thanks.
Ax = b is a linear system. If Ax = b cannot be solved by using cramers rule then A is not a square matrix. Is this true or false?
Click here to see answer by jim_thompson5910(28699)

Question 582471: Is my answer correct?
Suppose u, v and w are vectors in 3-space. Which are/is defined?
A) (v.w) . u

B) (w x u) x v

My answer is only A is defined
Click here to see answer by jim_thompson5910(28699)

Question 584134: At a college basketball game, students’ tickets cost 12 pesos each, adults’ tickets cost 16 pesos each and children’s tickets cost 7 pesos each. Four times as many adults’ tickets as children’s tickets were sold; the total number of children’s tickets and adults’ tickets was half the number of students’ tickets. The total number of tickets sales was 33,043 pesos. How many of each type of ticket was sold?
Click here to see answer by richwmiller(9144)

Question 584954: Find the value of the determinant
|-6 -6|
|b a|
Click here to see answer by Alan3354(31505)

Question 584954: Find the value of the determinant
|-6 -6|
|b a|
Click here to see answer by solver91311(17070)

Question 585291: 3x+2y=13
2x-y=4
Click here to see answer by mananth(12270)

Question 585818: In the matrix below, which element is a1,2?
123
456
789
Click here to see answer by Edwin McCravy(8999)

Question 585816: What is the determinant of B?
B = [-18 3]
[ 4 1]
Click here to see answer by jim_thompson5910(28699)

Question 586547: Can someone please help and show me all steps?
Thanks
Add the matrices shown.
[3 -1 -4] + [-3 -6 12]
[5 9 0] [24 5 3]

Note that I am only adding two matrices, it just looks like 4 seperate ones, but they are both 2 by 3 matrices
Click here to see answer by stanbon(57953)

Question 586576: Someone please help and show steps
Calculate using either method
2[1 0 -5]
[5 -2 1]
[2 3 1]

Im guessing I multiply 2 by the 3 by 3 matrix?
Click here to see answer by solver91311(17070)

Question 586808: Complete the Multiplication 2Ea
E=[1,2] A=[3,0,2,-1]
Answers:
A.[7,-2]
B.[7,-4]
C.[14,-4]
D.14,4]
Click here to see answer by solver91311(17070)

Question 586999: Identify the solution to the system of equations.
3x-y=0
4x+2y=1
a.)(-1/2, 3/2)
b.)(1/10, 3/10)
c.)(1/9, 1/3)
d.)no solution
Click here to see answer by Alan3354(31505)

Question 586997: How can you translate the graph of y=|x| to obtain the graph of y=|x-4|+2?
a.)4 units left and 2 units up
b.)4 units left and 2 units down
c.)4 units right and 2 units up
d.)4 units right and 2 units down
Click here to see answer by josmiceli(9817)

Question 587289: 3x+2y=13
2x-y=4
Click here to see answer by richwmiller(9144)

Question 587969: The value of x for which A does not have an inverse.
A(2x2)=
-2 3
x 1
Click here to see answer by Alan3354(31505)

Question 588527: Fine the inverse matrix of A=2 -4 , find A^-1
-2 5

Can someone please help me and show all steps?
Thanks
Click here to see answer by jim_thompson5910(28699)

Question 589291: Using Cramer’s rule find x5 of the following system. No marks will be given if Cramer’s rule is not used. (solve the determinants by hand and show all work. You can use whichever method for finding
 1  2
1  2
0 0 1 0 3 0 14
1 1  x1 1 2  x2 1 3x3 11x4
  0    2 
=0   3 
1
13012x5
Click here to see answer by Edwin McCravy(8999)

Question 590094: find the determinant of
1 2 3
4 5 6
2 0 1
Click here to see answer by richard1234(5390)

Question 591711: 2w-3x+4y+z=7
w-x+3y-5z=10
3w+x-2y-2z=6
w+2x-y-3z=5
Click here to see answer by Alan3354(31505)

Question 591709: find x,y,z
2w-x+3y+z=0
3w-2x+4y-z=0
5w-2x-2y-z=0
2w+3x-7y-5z=0
Click here to see answer by Alan3354(31505)

Question 592297: Rewrite the system of equations as an augmented matrix. Then simplify the matrix to reduced row echelon form. Identify the solution to the system of equations;
x + y + z = 3
2x - y + z = 2
4x - 2y + 3z = 5

Click here to see answer by Edwin McCravy(8999)

Question 593151: 8X+13Y=271.80 10X+15Y=321.00 use theinverse of the coefficient matrix of the equivalent matrix equation to solve

Click here to see answer by stanbon(57953)

Question 594623: hi how do you solve a system of equations using a matrix when the matrix isn't square?
For example:
4x-y=2
2x+2y=1
4x-5y=3
?
Click here to see answer by Alan3354(31505)

Question 595862: I really need help solving this problem using Cramer's rule {x-y=2
y-x+4=0
I don't understand how to do it when there's an extra number involved (like the 4 in this case)

Click here to see answer by jsmallt9(3296)

Question 598493: 3x-4y+3z=-17
x-3y+2z=-8
x-2y+z=-5
Please help me find all possible solutions (Idenity Matrix)
Click here to see answer by Alan3354(31505)

Question 600813: Determine the linear velocity of a point rotating at an angular velocity of 7.1 radians per second at a distance of 12 centimeters from the center of the rotating object.
Click here to see answer by stanbon(57953)

Question 600824: Evaluate each expression
sin 5 pie over 6
tan 5 pie over 4
Click here to see answer by stanbon(57953)

Question 600823: State amplitude and period for each function y=3cos4 theta and y= -2 sin (3pie over 2) theta
Click here to see answer by lwsshak3(6751)

Question 601343: If a 2X2 MATRIX A=1 0 -1 1(last 2 term in 2nd line). T hen Proved that A*A-2A+I=0. And then find out the value of A^50.

Click here to see answer by flame8855(424)

Question 601689: 4 - (2x - 9)= -19
What do i do when there is a negative before the parenthesis?
Click here to see answer by jim_thompson5910(28699)

Question 601741: Solve using Cramers Rule
2x+4y=16
3x-5y=-9
Click here to see answer by Edwin McCravy(8999)

Question 602830: 2x1+x2+x3=10
3x1+2x2+3x3=18
3x1+4x2+9x3=16
Click here to see answer by stanbon(57953)

Question 602866: solve the system of equations using a matrix. separate the x and the y values with a comma. 2x+y=-22, -3x+8y=-24

Click here to see answer by Alan3354(31505)

Question 603323: solve for x and y in the equation:2^(x+4y)=1 and 2^(x+8y)=1/4
Click here to see answer by htmentor(807)

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