Monday

July 25, 2016
Number of results: 8,768

**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
*July 16, 2016 by Asfand*

**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 where P converts from ...
*July 20, 2007 by mathstudent*

**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 uses dot products, it is ...
*April 13, 2010 by Yadlay*

**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
*February 25, 2015 by kirsten*

**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}
*May 23, 2008 by chantel*

**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
*May 2, 2013 by Jess*

**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~~
*July 23, 2015 by Helen*

**maths**

solve the following simultaneous equations using matrices 3x-6y=24 and -4x+5y=-23
*January 2, 2008 by cecelia*

**Urgent please help! matrices**

solve using matrices x+3y-3z=12 3x-y+4z=0 -x+2y-z=1
*December 7, 2011 by Anonymous*

**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 = 0 has the unique ...
*December 4, 2006 by mathstudent*

**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?
*April 16, 2013 by OIan*

**maths (matrices)**

Find the value of a in the determinant of {6 3] [4 a] is a)6 b)3 c) 0 d)-12 (have the answers just need to know the working to get it)
*March 12, 2008 by Keisha*

**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.
*July 10, 2012 by INDIANA*

**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.
*July 11, 2012 by INDIANA*

**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.
*July 12, 2012 by INDIANA*

**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.
*July 16, 2012 by SAMARA*

**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.
*July 20, 2012 by Samara *

**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.
*October 27, 2007 by JaneLee*

**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
*November 21, 2011 by ZUkii*

**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 form: [A^-1|0 ] [C |...
*November 16, 2006 by James*

**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)
*October 18, 2011 by swendy*

**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)
*October 18, 2011 by swendy*

**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 am I completely off ...
*October 13, 2010 by Lisa*

**Maths - Matrices**

I'm having trouble with doing this matrix proof The question is "Given some matrix A has the property A*2=A^-1, show that determinant A = 1, i.e |A| = 1" I've tried for ages, but I can't seem to do it, this is what I got to A^2= A^-1 |A^2| = |A^-1| |A|^2 = 1/|A| Can someone ...
*March 29, 2009 by TP*

**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 uses dot products, it is ...
*April 15, 2010 by yadlay*

**Maths: Algebra Matrices Class 12th**

matrix{{0, 1, -1}, {2, 1, 3}, {1, 1, 1}} matrix{{1, -1, x}} matrix{{0}, {1}, {1}}=0 Find the value of x Don't give me the direct answer. Please tell me how to go about this. Draw in your notebook and then solve
*April 11, 2011 by Akash*

**maths**

a matrix X has a+b rows and a+2 columns while the matrix Y has b+1 rows and a+3 columns. both matrices XY and YX exist. find a and b. can you say XY and YX sre of same type? are they equal?
*April 4, 2013 by edward*

**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}} Show by computation ...
*September 17, 2013 by Anon.*

**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 squares problem like this...
*January 7, 2009 by sergei*

**Algebra II (Matrices)**

My book doesn't solve it like a linear equation, they solve it by using inverse matrices. Solve the matrix equation: |4 -5||m|=|32| |1 2| |n|=|-5| A= |4 -5| |1 2| X= |m| |n| B= |32| |-5| Step 1. Find the inverse of the coefficient matrix. A^-1= 1/13|2 5| |-1 4| (I get confused...
*February 29, 2008 by Jon*

**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 an animal and that ...
*November 27, 2006 by Miranda*

**Maths**

Question(1):Show that the curve y=x^2-3x-5 passes through the point (5,5),(4,-1),(2,-7),(0,-5) and (-t,5) calculate the gradient at each pont. question(2):given a 5by5 matrices with determinant equal zero and the same determinant of its interior element equals zero question(3...
*August 2, 2015 by Edward*

**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 third row... Then ...
*May 21, 2014 by Anonymous*

**Pre Calculas**

7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} 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 algebraically...
*October 6, 2015 by Bob*

**Hall**

how do you do matrices
*December 19, 2007 by Tiarre*

**math**

Why is (AB)^-1 = B^-1A^-1 in matrices, and not (AB)^-1 = A^-1B^-1
*December 16, 2009 by katy*

**math**

matrices
*January 28, 2016 by khadija*

**math**

4x-y+z=-5 2x+2y+3z=10 5x-2y+6z=1 solving x,y,z with Matrices
*May 4, 2008 by yumei*

**math**

(3 2 4 0) (x y)=(7 12) find x and y in this matrices
*October 18, 2011 by swendy*

**math**

4x-y-3z=8 2x+2y-z=3 6x+y-3z=2 help me solve matrices
*March 13, 2013 by jenny*

**matrices**

Given B = 0 1 0 0 0 1 1 0 0 , show that B^3 = I
*May 10, 2015 by Neil*

**math**

solve system by matrices 2x+3y-z=-8 x-y-z=-2 -4x+3y+z=6
*February 24, 2009 by jessica*

**math**

solve this system by matrices 2x+3y-z=-8 x-y-z=-2 -4x+3y+z=6
*February 24, 2009 by jessica*

**math**

linear matrices? how to solve?
*May 7, 2009 by me*

**math**

(B-C)^2=(C-B)^2, Where B and C are (n x n) in matrices.Is it true or false.
*April 15, 2011 by Fakaapo. Suetusi*

**math**

Solved problems on matrices
*November 6, 2011 by Dm*

**matrices**

find the sum or differnce [ -2 -1 7 ] [ -2 0 8 ] [0 -3 2 ] + [-9 5 -1 ]
*August 26, 2013 by skyler*

**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]
*January 26, 2015 by Hannah*

**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 condominiums sold for...
*November 2, 2009 by please help(:*

**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 condominiums sold for...
*November 2, 2009 by hmmm...*

**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 condominiums sold for...
*November 2, 2009 by hmmm...*

**Algebra II**

Solve this system using matrices. 3.7x - 2.3y + 4.2z = 8 2.6x + 4.6y - 3.9z = 10 8x + 2z = 20
*October 26, 2007 by JaneLee*

**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.
*February 8, 2010 by anonymous*

**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.
*February 8, 2010 by anonymous*

**math**

how will you solve these equations using matrices x+y=1 and 3x-2y=4/3
*June 27, 2010 by sha*

**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
*April 18, 2011 by Fakaapo*

**Matrices**

Gaussian row elimination method: (i) x+3y+z=4 x-2y-2z=3 2x+y-z=9 (ii) x+2z+y=0 2x+y+z=6 3x+3y+2z=14
*August 13, 2011 by Zinnia*

**MathJ.C.**

Solve the system using matrices 4x+2y=2 5x+8y=30
*October 22, 2013 by JaimeC.*

**math**

A and B are two matrices. If A= 1 2 4 3 Find B given that A^2 = A +B
*February 6, 2015 by kudu*

**math (matrices)**

Find the values of x and y for which: [2y+5] [x-1] [y - 2] = [ 3x ] is true. a. (-1, -1) b. (-2, -4) c. (5, 1) d. (-1, 4) I got B...?
*May 24, 2009 by sophie*

**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]
*December 1, 2010 by Daria*

**calc**

Find the inverse of each of the following matrices, if possible [i 3 1+i -i]
*April 21, 2015 by Anonymous*

**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 condominiums sold for...
*November 2, 2009 by please help(:*

**Analytic Geometry**

Solve each equation using augmented matrices. 2x+y-2z=7 x-2y-5z=-1 4x+y+z=-1
*October 3, 2007 by Anonymous*

**math **

Solve the following system of equations using matrices x = -2y + 6 2x + 2y = 16
*July 15, 2011 by kailin*

**Math **

solve the following system of equations using matrices 4x-2y=7 7x+y=13
*July 29, 2014 by Keya *

**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?
*January 13, 2015 by sam*

**algebra**

solve the set of linear equations by the matrices method: a+3b+2c=3, 2a-b-3c=-8,5a+2b+c=9
*April 7, 2015 by linear*

**math**

slove the game with following pay-off 3*3 matrices:((2,3,1/2)(3/2,2,0)(1/2,1,1))
*May 29, 2016 by priya*

**algebra 2--matrices.**

A grocer wants to m,ix three kinds of hard candy to sell for $2.40 per pound. He need 50 pounds of candy altogether. He mixes sour balls worth $3.50 per pound,butterballs worth $2.50 per pound, and starlight mints worth $1.75 per pound. He mixes twice as many butterball as ...
*February 21, 2010 by Alyssa.*

**math**

Solve the following matrices.(sORRY I DONT 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 =
*November 30, 2008 by heidi*

**math**

solve the following system of the equations using matrices 10x-5y=4 7x+y=10
*August 11, 2014 by Keya *

**Precalculs**

Use matrices to solve x+ +2y+3z=7 -x+2y-z -x+y-2z=-2 I've tried many way cant figure out
*April 21, 2016 by Anonymous*

**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
*October 29, 2008 by Amanda*

**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]}
*May 18, 2009 by Jesse*

**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
*October 29, 2008 by Amanda*

**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
*October 5, 2011 by Allan *

**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! :)
*December 3, 2012 by Tori*

**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
*April 16, 2015 by Ciara*

**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 ;)
*July 21, 2015 by Katy*

**Maths - Matrices**

Matrix transformations- please help? let f be the linear transformation represented by the matrix M = (4 2) .......(0 -2) a) state what effect f has on areas and whether it changes orientation b) Find the matrix that represents the inverse of f c) Use the matrix you found in ...
*May 22, 2008 by Anonymous*

**Pre-Calculus/Trigonometry**

Solve the following system of equations algebraically. Verify your solution by using matrices. 3x-y=0 5x+2y=22
*September 29, 2014 by Anonymous*

**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
*April 15, 2015 by Ciara*

**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
*April 16, 2015 by Ciara*

**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
*April 16, 2015 by Ciara*

**Math**

Make a complete re search project on maths is interconnected with other subject i.e. Maths Vs computer using art with maths.
*June 5, 2012 by Shivansh Tomar*

**Pre Calculas**

7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} 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 algebraically...
*October 6, 2015 by Ryan*

**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.
*December 8, 2013 by Syed Muhmmad ibadulah*

**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.)
*May 25, 2014 by Aly*

**Pre-Calculus/Trigonometry**

Solve the following system of equations algebraically. Verify the solution by using matrices. 8x-2y=5 -12x+3y=7
*September 30, 2014 by Anonymous*

**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
*April 17, 2015 by Ciara*

**maths letaracy,history,geography and life science **

im going to grade 10 next year,and i want to be a psychologist and im going for maths letaracy and history feild im realy not good with maths and i just found out a few weeks ago that i need pure maths to do psychology.i dont know what to do now ,i also dont know the jobs ...
*October 26, 2013 by khanyisa maringa*

**business studies n maths lit n accounting n geo**

Do I need pure maths in These subjects or is maths lite fine to get me to the point of being a entreprenuer in my life
*January 21, 2015 by bafana matseke*

**maths**

suresh scored 15 mareks more than ramesh in maths.if the sum of their marks in maths is 275.write the statement in linear equation in two variables
*January 25, 2016 by stefan *

**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?
*April 16, 2013 by ayan*

**Pre calculus**

olve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z = -5 x - y + 3z = -1 4x + y + z = -2 I need it explained to me, how do I do this?
*May 29, 2016 by Kim*

**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
*May 29, 2016 by priya*

**math**

Solve the following matrices (I dont know how to do brackets so I will just use commas to seperate the numbers and put them in different lines) A= 0, -2, 3, 1 -3, 1, 0, 4 0, 5, -2, -1 B= 1, -4 -2, 1 3, 0 C= -1, 0, 2 0, 3, 4 0, 8, -1 E= 1 2 3 4 F= -2, 5 3, 7 0, 9 FIND: ) AE = b...
*November 30, 2008 by heidi*

**algebra**

I having serious problems trying to solve this equation please help me find the product matrix for this input-output and demand matrices A= [ 0.1 0.03] D= [5] [ 0.07 0.6] [10]
*April 26, 2014 by JC*

**Algebra**

Find the coordinates of the image after a reflection in the given line. [-8, 1, -7] [-7, -5, 1]; y axis I am really bad with these types (matrices) of questions, please help me.
*May 26, 2014 by Sarah*