1. linear algebra

    if: A and B are matrices and A^2 is similar to B^2 Is A guaranteed to be similar to B? ------- Matrix similarity means that the matrices are identical if one of the matrices is converted to another basis. If matrices C and D are similar: C = P^-1 * D * P

    asked by mathstudent on July 20, 2007
  2. math

    Which of the following subsets of the vector space Mnn are subspaces? (a) The set of all n × n symmetric matrices (b) The set of all n × n diagonal matrices (c) The set of all n × n nonsingular matrices

    asked by kirsten on February 25, 2015
  3. Math (matrices)

    No one answered my matrix question. Let me rephrase: Let A, B, and 0 be 2x2 matrices. Assuming that A is invertible and 0 is all zeroes, what is the inverse of the matrix [A|0] [B|A] (that is a 4x4 matrix represented as 4 2x2 matrices) The answer is in the

    asked by James on November 16, 2006
  4. Algebra II

    Can a matrix have a two digit number? I have to add the matrices[3 4] +[2 7] [7 6] +[3 8] Sorry this is the only way I know haw to put matrices on the board.

    asked by JaneLee on October 27, 2007
  5. maths

    If two matrices are known and are inverse of each other.How can we use these matrices to find the point of intersections for the given set of 3D planes? Kindly help

    asked by Asfand on July 16, 2016
  6. Algebra

    Provide an appropriate response. Suppose that A and B are two matrices such that A + B, A - B, and AB all exist. What can you conclude about the dimensions of A and B? A) A is a row matrix and B is a column matrix. B) A and B have the same dimension, but

    asked by sandy on July 30, 2018
  7. Linear algebra

    find the inverse of the following matrices if they exist. [1 -2 3] [3 1 0] [-2 1 1] the following represent a 3 x 3 matrices

    asked by ZUkii on November 21, 2011
  8. Math

    Can someone check my answer? Given matrices A,B, and C are all 2 x 2, determine whether the equation is true for the given matrices. C(A+B) = AC +BC My answer: False Matrix multiplication is not commutative. My answer: true For matrices, A + B = B + A My

    asked by Natti on December 22, 2018
  9. Data management

    Problems solving with Matrices [-3 1] * [ 4 7 0] 2 5 -3 -5 1 I'm stuck with this matrices. Please help me~~

    asked by Helen on July 23, 2015
  10. Math

    I have a few questions about T-Matrix. In excel, I am suppose to work with powered matrices to construct a weighted T matrix, using a scalar of .7. Does this mean I multiply each of the powered matrices by .7? Or do I power the powered matrices by .7? Or

    asked by Lisa on October 13, 2010
  11. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by SAMARA on July 16, 2012
  12. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by INDIANA on July 12, 2012
  13. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by Samara on July 20, 2012
  14. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by INDIANA on July 11, 2012
  15. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by INDIANA on July 10, 2012
  16. Math: matrices

    If A and B are both square n x n matrices, If AB = I, prove BA = I Presumably you have to do this without using the usual properties of the inverse of matrices. But we do need to use that if there exists a matrix B such that A B = I then the equation A X =

    asked by mathstudent on December 4, 2006
  17. Math

    Suppose C and D are 2 × 2 matrices with det(C) = −3 and det(D) = 2. Find the determinant of the matrices 8C^3D2 and 5 C^-1

    asked by Amelia on December 3, 2017
  18. matrices

    Two matrices can be multiplied only if their sizes are compatible. Suppose that U is an m × n matrix, and that V is a p × q matrix. In order for U•V to make sense, what must be true of the dimensions of these matrices? Although matrix multiplication

    asked by Yadlay on April 13, 2010
  19. math

    Two matrices can be multiplied only if their sizes are compatible. Suppose that U is an m × n matrix, and that V is a p × q matrix. In order for U•V to make sense, what must be true of the dimensions of these matrices? Although matrix multiplication

    asked by yadlay on April 15, 2010
  20. math

    What does it mean to have two matrix variables written vertically inside parentheses? In other words, if A and B are matrices, what does this mean (imagine there is one set of parentheses spanning both rows): (A) (B) I'm trying to understand a least

    asked by sergei on January 7, 2009
  21. math

    step by step how do we find the value of x and y in this matrices by the law of matrices (3 2 4 0) (x y)=(7 12)

    asked by swendy on October 18, 2011
  22. math

    step by step how do we find the value of x and y in this matrices by the law of matrices (3 2 4 0) (x y)=(7 12)

    asked by swendy on October 18, 2011
  23. algebra-math

    Make a preferred method of solving a system of linear equations and why. Which method do you prefer? Do you think that matrices make the process easier? Or do you prefer not to use matrices? Once again thank you for any help given on this.

    asked by Mike on August 6, 2017
  24. Math

    Use a system of equations to find the quadratic function f(x) = ax^2 + bx + c that satisfies the equations. Solve the system using matrices. f(−2) = 4, f(1) = −2, f(2) = −12 The answer i got is f(x)=-2x^2-4x+8 this is the steps of how i got

    asked by anonymous on April 9, 2019
  25. Math

    Matrices are as follows reading left to right: X=MatrixForm{{0,1},{1,0}} Y=MatrixForm{{0,-i},{i,0}} Z=MatrixForm{{1,0},{0,-1}} H=MatrixForm 1/sqrt(2){{1,1},{1,-1}} S=MatrixForm{{1,0},{0,i}} T=MatrixForm{{1,0},{0,exp(i(pi)/4)}} v=MatrixForm{{alpha},{beta}}

    asked by Anon. on September 17, 2013
  26. Math

    There are 18 animals in the barnyard. There are 50 legs. How many cows and how many chickens are there in the barnyard? Technically, I wonder if a chicken is an animal. And are chickens and cows the ONLY "animals" in the barnyard. If we assume a chicken is

    asked by Miranda on November 27, 2006
  27. Precalculus

    Find the values of x and y. Matrices.. [-4 2 3 5 3 5 2 -3 1] TIMES [2 x 5] EQUALS [9 38 y] It is difficult for me to type the matrices in but.... The first matrix is 3x3 consisting of -4,2,3 in the first row.. 5,3,5 in the second row ......2,-3,1 in the

    asked by Anonymous on May 21, 2014
  28. MATH!

    The Mountain Trail Resort sold 64 condominiums last year, all 1, 2, or 3 bedroom condominiums. The total revenue from the sale of the condominiums was $5,493,000. The combined square footage of all the condominiums sold was 51,544 square feet. One bedroom

    asked by hmmm... on November 2, 2009
  29. Math

    The Mountain Trail Resort sold 64 condominiums last year, all 1, 2, or 3 bedroom condominiums. The total revenue from the sale of the condominiums was $5,493,000. The combined square footage of all the condominiums sold was 51,544 square feet. One bedroom

    asked by please help(: on November 2, 2009
  30. MATH!

    The Mountain Trail Resort sold 64 condominiums last year, all 1, 2, or 3 bedroom condominiums. The total revenue from the sale of the condominiums was $5,493,000. The combined square footage of all the condominiums sold was 51,544 square feet. One bedroom

    asked by hmmm... on November 2, 2009
  31. Math.

    The Mountain Trail Resort sold 64 condominiums last year, all 1, 2, or 3 bedroom condominiums. The total revenue from the sale of the condominiums was $5,493,000. The combined square footage of all the condominiums sold was 51,544 square feet. One bedroom

    asked by please help(: on November 2, 2009
  32. Pre Calculas

    7. For the function defined by: f(x)= {x^2, x1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3x-y=0 5x+2y=22 9. Solve the following system of equations

    asked by Bob on October 6, 2015
  33. Hall

    how do you do matrices

    asked by Tiarre on December 19, 2007
  34. math

    matrices

    asked by khadija on January 28, 2016
  35. math

    Why is (AB)^-1 = B^-1A^-1 in matrices, and not (AB)^-1 = A^-1B^-1

    asked by katy on December 16, 2009
  36. Pre Calculas

    7. For the function defined by: f(x)= {x^2, x1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3x-y=0 5x+2y=22 9. Solve the following system of equations

    asked by Ryan on October 6, 2015
  37. Math

    Solve for X using the matrices below. 2A + 4B = −2X A= ((8,-5) (9,0) (5,-6)) B= ((0,7) (4,0) (-6,-1))

    asked by anonymous on March 31, 2019
  38. math

    (3 2 4 0) (x y)=(7 12) find x and y in this matrices

    asked by swendy on October 18, 2011
  39. math

    4x-y+z=-5 2x+2y+3z=10 5x-2y+6z=1 solving x,y,z with Matrices

    asked by yumei on May 4, 2008
  40. Urgent please help! matrices

    solve using matrices x+3y-3z=12 3x-y+4z=0 -x+2y-z=1

    asked by Anonymous on December 7, 2011
  41. math

    4x-y-3z=8 2x+2y-z=3 6x+y-3z=2 help me solve matrices

    asked by jenny on March 13, 2013
  42. math

    A and B are two matrices. If A= 1 2 4 3 Find B given that A^2 = A +B

    asked by kudu on February 6, 2015
  43. math

    matrices: A=[-5 4 -6 B=[-2 4 -5 9 -8 7 8 9 3 4 -3 9] 5 -2 2] AB=? please show the work if you can.

    asked by anonymous on February 8, 2010
  44. math

    (B-C)^2=(C-B)^2, Where B and C are (n x n) in matrices.Is it true or false.

    asked by Fakaapo. Suetusi on April 15, 2011
  45. Finite Math

    Can someone please help me. I am not sure to work the following matrices. If A^4 = -3 4 -4 5 and A^5= 4 -5 5 -6 What is A? Can you show me how you got this? Thank you so much ;)

    asked by Katy on July 21, 2015
  46. calc

    Find the inverse of each of the following matrices, if possible [i 3 1+i -i]

    asked by Anonymous on April 21, 2015
  47. algebra. help!

    MATRICES What is the sum of [3/4 -2/-3]+[-5/3 -4/-2]? a. [-8/1 2/6] b. [-2/7 2/-1] c. [2/-7 6/5] d. [-2/7 -6/-5]** What is the difference of [3/4 -2/-3]-[2/7 -5/12] a. [-3/-1 3/7] b. [1/-3 3/-15] c. [-3/3 -3/15]** d. [-1/3 3/-15]

    asked by Hannah on January 26, 2015
  48. math

    Solved problems on matrices

    asked by Dm on November 6, 2011
  49. math

    matrices: A=[-5 4 -6 9 -8 7 4 -3 9] B=[-2 4 -5 8 9 3 5 -2 2] AB=? please show work if you can.

    asked by anonymous on February 8, 2010
  50. Algebra II

    Solve this system using matrices. 3.7x - 2.3y + 4.2z = 8 2.6x + 4.6y - 3.9z = 10 8x + 2z = 20

    asked by JaneLee on October 26, 2007
  51. Pre-Calc

    I have to solve these using matrices by hand. Can someone please help me? 2x-3y-2z=4 (1/4)x-(2/5)y+(3/4)z=(-1/3) -2x+1.3y-3z=5 Thank you so much! :)

    asked by Tori on December 3, 2012
  52. math

    linear matrices? how to solve?

    asked by me on May 7, 2009
  53. math

    how will you solve these equations using matrices x+y=1 and 3x-2y=4/3

    asked by sha on June 27, 2010
  54. math

    solve this system by matrices 2x+3y-z=-8 x-y-z=-2 -4x+3y+z=6

    asked by jessica on February 24, 2009
  55. math

    solve system by matrices 2x+3y-z=-8 x-y-z=-2 -4x+3y+z=6

    asked by jessica on February 24, 2009
  56. Precalculs

    Use matrices to solve x+ +2y+3z=7 -x+2y-z -x+y-2z=-2 I've tried many way cant figure out

    asked by Anonymous on April 21, 2016
  57. maths

    x and y are two matrices x= {-2 0} and y {4 -1} {5 1} {3 7} evaluate x^2+y is the ans={8 -1} {18 8}

    asked by chantel on May 23, 2008
  58. MathJ.C.

    Solve the system using matrices 4x+2y=2 5x+8y=30

    asked by JaimeC. on October 22, 2013
  59. Math

    Solve the following system of equations by using matrices. x-2y=-6 2y-z=1 x+3z=7

    asked by Lola T on September 23, 2017
  60. Analytic Geometry

    Solve each equation using augmented matrices. 2x+y-2z=7 x-2y-5z=-1 4x+y+z=-1

    asked by Anonymous on October 3, 2007
  61. pre calculus

    use matrices to solve the system of equations , if possible. 2x+y+2z=4 2x+2y=5 2x-y+6z=2

    asked by Anonymous on December 4, 2016
  62. pre calculus

    use matrices to solve the system of equations , if possible 2x+3y+z=10 2x-3y-3z=22 4x-2y+3z=-2

    asked by Anonymous on December 4, 2016
  63. Math

    solve the following system of equations using matrices 4x-2y=7 7x+y=13

    asked by Keya on July 29, 2014
  64. math

    Solve the following system of equations using matrices x = -2y + 6 2x + 2y = 16

    asked by kailin on July 15, 2011
  65. maths

    solve the following simultaneous equations using matrices 3x-6y=24 and -4x+5y=-23

    asked by cecelia on January 2, 2008
  66. math

    (B-C)^2=(C-B)^2 ,where B and C are (n x n) matrices.what is the answer, it is true or false

    asked by Fakaapo on April 18, 2011
  67. math

    slove the game with following pay-off 3*3 matrices:((2,3,1/2)(3/2,2,0)(1/2,1,1))

    asked by priya on May 29, 2016
  68. Discrete Math

    ( 0,0,0,1 0,0,1,0 1,1,0,1 1,1,1,0) How would I draw the adj matrices if i cannot connect c and a and d and b?

    asked by Adedeji Ogunba on November 25, 2018
  69. Math

    Suppose A and B are non-zero matrices such that A^2=0 and B^3=0(But B^2 does not =0) find in simplst form: a)(A+B)^2 b)(A+B)^3 c)(A+B)^4 d)(A+B)^5 e)(A+B)^6

    asked by Amanda on October 29, 2008
  70. math

    Solve the following matrices.(sORRY I DON'T KNOW HOW TO DO THE BRACKETS) B= 1, -4 -2, 1 3, 0 D= 0, 1 1, 0 G= -3, 1 4, 5 FIND: a) DG = b) GD = c) BG = d) DD = e) GG =

    asked by heidi on November 30, 2008
  71. math

    solve the following system of the equations using matrices 10x-5y=4 7x+y=10

    asked by Keya on August 11, 2014
  72. college- Linear Algebra

    Give example of two non-zero matrices A and B such that A^2=0, B^2=0 but AxB and BxA do not equal zero.

    asked by Amanda on November 6, 2008
  73. Linear Algebra

    Give example of two non-zero matrices A and B such that A^2=0, B^2=0 but AxB and BxA do not equal zero.

    asked by Amanda on November 6, 2008
  74. Linear Algebra

    Suppose A and B are non-zero matrices such that A^2=0 and B^3=0(But B^2 does not =0) find in simplst form: a)(A+B)^2 b)(A+B)^3 c)(A+B)^4 d)(A+B)^5 e)(A+B)^6

    asked by Amanda on October 29, 2008
  75. MATH

    Perform the operation for each equation, if there is a solution (Matrices) [4k -8y ] [5k+6y 2k+1] [6z - 3x] - [2z+5x z+4] [2k + 5a] [4k+6a 3a+2]

    asked by Daria on December 1, 2010
  76. Maths

    Let A,B and C be matrices such that A=(1 2 3 1 2 3) , B=(1 2 2 4 2 3) and C=AB. What is the sum of all the elements (entries) of matrix C?

    asked by OIan on April 16, 2013
  77. calc

    Is the matrix 6 0 0 5 a linear combination of the matrices 1 0 0 1 and 1 0 0 0 ? how do you figure this out?

    asked by sam on January 13, 2015
  78. Math

    Find a system of linear equations corresponding to the following augmented matrices: (a) 2 0 |0 3 −4 |0 0 1 |1 (b) 3 0 −2 |5 7 1 4 |−3 0 −2 1 |7 (c) 7 2 1 −3 |5 1 2 4 0 |1 (d) 1 0 0 0 |7 0 1 0 0 |−2 0 0 1 0 |3 0 0 0 1 |4

    asked by Matt on October 25, 2011
  79. Matrices (math)

    0.433= (45.6*A) + (3.152*B) 0.3363= (11.92*A) + (37.675*B) Solve for A and B using matrices

    asked by Jess on May 2, 2013
  80. Matrices

    Solve the system using matrices. Show all the row operations that you use. 3x-9y=30 2x+5y= -2

    asked by Tayb on September 21, 2016
  81. math

    Find values of x and y, if any, that will make the matrices equal. [ x y ] = [ 3 5 ] 1 9 1 9 a. x=-3,y=-5 b. x=5,y=3 c. x=-3,y=5 d. x=3,y=5 e. no solution

    asked by laura on August 26, 2016
  82. algebra

    solve the set of linear equations by the matrices method: a+3b+2c=3, 2a-b-3c=-8,5a+2b+c=9

    asked by linear on April 7, 2015
  83. PRECALC QUESTION

    Solve for "x" and "y" given the following matrix equation: (2x, 0.5y, -2, 1) * (3, -2, 0, 1) = (-24, 19, -6, 5) (the matrices are going from left to right, they're all 2x2's.)

    asked by Aly on May 25, 2014
  84. Algebra

    How would you solve this matrices using the Gauss-jordan elimination method? {[-5, 8, 10]} {[5, 8, 4]} {[10, 8, 5]} {[5, 4, 8]}

    asked by Jesse on May 18, 2009
  85. math

    Let A,B and C be matrices such that A=⎛⎝132213⎞⎠, B=(122423) and C=AB. What is the sum of all the elements (entries) of matrix C?

    asked by ayan on April 16, 2013
  86. Linear Algebra

    Find the inverse of the matrices if they exist. Use the algorithm introduced in this section. 1 2 -1 -4 -7 3 -2 -6 4

    asked by Allan on October 5, 2011
  87. Pre-Calculus/Trigonometry

    Solve the following system of equations algebraically. Verify your solution by using matrices. 3x-y=0 5x+2y=22

    asked by Anonymous on September 29, 2014
  88. Math

    Find the inverse for the following matrices: 2 and -4 is on top 6 and 3 is on bottom My answer is 90 120 -180 60

    asked by Aria on April 25, 2017
  89. math

    use dominance to slove the game with following pay-off matrices: ((2 3 1/2) (3/2 2 0) (1/2 1 1)). ANS: A=(1/4,0,3/4); B=(1/4,0,3/4); v=7/8. i got answer, but how to do this? i need solution

    asked by priya on May 29, 2016
  90. pre-calc - JAI

    Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2

    asked by Ciara on April 17, 2015
  91. HELP PLEASE

    Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2

    asked by Ciara on April 16, 2015
  92. Buisness Math

    Given the following matrices: Compute (i) AB (ii) A+2B (iii) AC (iv) 5C (v) B-C Note:Give proper reason where computation is not possible.

    asked by Syed Muhmmad ibadulah on December 8, 2013
  93. pre-calc

    Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2

    asked by Ciara on April 16, 2015
  94. pre-calc

    Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2

    asked by Ciara on April 16, 2015
  95. Math Help

    Hi! I need help with this question. Thanks! Directions: To solve these problems, you need to find the inverses of these 2x2 matrices. a.) D= [-3 -6 6 12] b.) C= [2 1 7 3]

    asked by Katy on March 30, 2015
  96. Solving system of linear equations

    I already know the 3 methods of doing it, but I recently found out about using matrices to solve it. How exactly do you do that? All I can remember is something with rref on my calculator.

    asked by Chopsticks on February 22, 2009
  97. pre - CALCULUS

    Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2

    asked by Ciara on April 15, 2015
  98. Pre-Calculus/Trigonometry

    Solve the following system of equations algebraically. Verify the solution by using matrices. 8x-2y=5 -12x+3y=7

    asked by Anonymous on September 30, 2014
  99. Maths

    7i1 + 9i2 = 3 5i1 + 7i2 = 1 where i1 and i2 represent current. Find the values of i1 and i2 using matrices. ? any help thanks

    asked by Sammy on January 11, 2017
  100. business algebra

    Use row operations on augmented matrices to solve the given systems of linear equations. x + y − z = 0 x + 2y + 4z = −3 3x − y − 22z = 19

    asked by cameron on November 16, 2015

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