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

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

Question 362749: Matrice question

+2
Click here to see answer by Manny Pacquiao(82)

Question 362789: How to solve the sum of two numbers is 16. The second number is twice the first
Click here to see answer by Manny Pacquiao(82)

Question 362792: 3x+y
Click here to see answer by Manny Pacquiao(82)

Question 362786: solve x_4=3 22
Click here to see answer by Manny Pacquiao(82)

Question 363184: how do you solve the equation for the given variable w/x=y/z;z
Click here to see answer by Fombitz(32388)

Question 363245: how do u construct a 3x3 square martix,A, where(the i and j are little letters to the bottem of the A) Aij=i^2+2j-3
Click here to see answer by solver91311(24713)

Question 363246: how do u construct a 3x3 square martix,A, where(the i and j are little letters to the bottem of the A) Aij=i^2+2j-3
Click here to see answer by Fombitz(32388)

Question 364426: Solve the matrix equation
-2x+3■(2&-8@-4&2)=■(4&-6@2&-8)
I am not sure how to type matrices in here.
Please help, I am trying to help my son with his algebra and neither one of us understands how to do this. Could you please explain in step by step instructions. Thank You.
Click here to see answer by Fombitz(32388)

Question 364796: [1 2]5
[-2 3]4
Click here to see answer by Fombitz(32388)

Question 364823: Solve for X ( 2x2 matrix )

Click here to see answer by Edwin McCravy(20054)

Question 365000: How do I solve using cramer's rule?
2a+3b=6
2a+b=-2
Click here to see answer by ewatrrr(24785)

Question 365141: please solve this 2x+3y+4z=2
2x+y+z=3
3x+2y+2z=4
Click here to see answer by Alan3354(69443)

Question 365557: What is the 6X6 identity matrix?
Click here to see answer by Alan3354(69443)

Question 365778: 7 2 determine whether the matrix has an inverse. If an inverse exists, find it.
0 -3
Click here to see answer by jim_thompson5910(35256)

Question 365789: determine whether the matrix has an inverse. if an inverse matrix exists, find it.

Click here to see answer by Edwin McCravy(20054)

Question 366299: what is an ordered triple that would be a solution to the quation
2x-4y+3z=10
Click here to see answer by stanbon(75887)

Question 366298: what is an ordered triple that would be a solution to the quation
2x-4y+3z=10
Click here to see answer by robertb(5830)

Question 366377: if

find the values of m and n given that (AA)= mA+nA
(A is a matrix of order 2�2)
Click here to see answer by Edwin McCravy(20054)

Question 366412: Please help me solve this equation:
| x 5 2 |
|-6 4 1 | = x^2 + 22x - 1
| 3 1 x |
I've tried:
(solving the 3x3..)
4x^2+15-12-24-x+30x
4x^2+29x-21
(then equaling that to the right part of the original equation...)
4x^2+29x-21=x^2+22x-1
3x^2+7x-20=0
I don't know know where to go from there to solve for x.
Click here to see answer by solver91311(24713)

Question 366526: what is the awnser for 3x-3y=21
2x-2y=10
Click here to see answer by Fombitz(32388)

Question 366600: Can you help me on understanding the concept of matrices?
Click here to see answer by nyc_function(2741)

Question 368137: find the area of the traingle using determinants
(-1,3) (-2,0) (4,1)
Click here to see answer by Edwin McCravy(20054)

Question 368227: Please help with this question.
Write the system of equations for the augmented matrix shown
1 1 6 3
1 1 3 3
1 2 4 7

Click here to see answer by robertb(5830)

Question 368234: I need help with this problem please. I did row-1---row-2 then 2row-2----r2 then 3r1 + r3--r3 and I am stuck....Any help plssssss.. Thanks
Use elementary row operations to solve the linear system
X � y + 3z = 4
X + 2y � 2z = 10
3x � y + 5z = 14

Click here to see answer by solver91311(24713)

Question 368336: A mechanic has some 30% antifreeze solution and some 50% solution. How many liters of each should be used to get 50 liters of a 46% solution? Solve by using determinants.

I'D REALLY APPRECIATE THE HELP!
Click here to see answer by ewatrrr(24785)

Question 368766: how do i solve this problem using matrix?
x/6 +y/10=3
5x/16 - 3y/16=15/8
Can you also show me the cramer method. I'm lost with the fractions in the equation.

Click here to see answer by mananth(16946)

Question 368882: 4x+y=-7
x-2z=4
3y+2z=8

Click here to see answer by haileytucki(390)

Question 369886: how do you add and subtract matrices?
Click here to see answer by robertb(5830)

Question 370129: what is the difference between diagonal matrix and scalar matrix?
Click here to see answer by jim_thompson5910(35256)

Question 370212: Solve the system of equations if possible.
2x-3y-z=15
2x+3y+z=1
2x+3y-z=3
Click here to see answer by Alan3354(69443)

Question 370213: If possible, solve the system of equations using an inverse matrix.
x+2y+z=-3
3x+7y-2z=25
x-y-6z=27
Click here to see answer by Fombitz(32388)

Question 370453: Systems with three variables.

Solve
3x+2y-z=1
x-2y+z=0
2x+y-3z=-1

Click here to see answer by Edwin McCravy(20054)

Question 371066: -2x+y-6z=-114
12x+6y=132
x+z=12
not sure how to do this- do you put 0 for those that don't have three?
I am supposed to do this with Cramer's Rule. need to find the value of the numberator determinant.
Click here to see answer by Edwin McCravy(20054)

Question 371206: does this system of equation have a unique solution?
7x-2y=15
-28x+8y=7
Click here to see answer by nyc_function(2741)

Question 371206: does this system of equation have a unique solution?
7x-2y=15
-28x+8y=7
Click here to see answer by jsmallt9(3758)

Question 371206: does this system of equation have a unique solution?
7x-2y=15
-28x+8y=7
Click here to see answer by robertb(5830)

Question 371207: does this system have a unique solution? yes or no?
20x+5y=33
-32x+8y=47
Click here to see answer by nyc_function(2741)

Question 371207: does this system have a unique solution? yes or no?
20x+5y=33
-32x+8y=47
Click here to see answer by jsmallt9(3758)

Question 371319: Given the following system of three equations

Find the values of x, y, and z by
i) Cramer�s rule
ii) Matrix inversion
Can anyone please help me... Brigita
Click here to see answer by jim_thompson5910(35256)

Question 372188: to solve a system of equations with cramer's rule what is the correct order?
Click here to see answer by solver91311(24713)

Question 372243: I am confused about this problem I have.This is the equations: x-y+2z=5
3x+2y=4
-2x+2y-4z=-10
Can this be solved even though the second equations doesn't have a "z" value?
Click here to see answer by robertb(5830)

Question 372465: What number is this:
1.374389535E14
Click here to see answer by robertb(5830)

Question 373524: Augmented Matrix
x+3y-4z=5
-2x-5y+z=9
7x-y-z=-2
how do you solve for x,y,z?
Click here to see answer by dianitaa_328(8)

Question 373770: Write the partial fraction decomposition of each rational expression.
x/x^2-5x+6

1/(x+1)(x^2+4)
Click here to see answer by robertb(5830)

Question 374563: what is the determinante
2x+3y=4
x-2y=9
Click here to see answer by rfer(16322)

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