125 Answered Questions for the topic matrices

Matrices

05/10/18

I need help understanding special cases in matrices

I need to solve this system of equations using a matrix: x+2y-z=2 , -2x+y-3z=6 , -x+3y-4z=8   I wound up with my matrix looking like this before I converted it back into equations again:      ... more
Matrices

04/11/18

Solve for matrices 3x-y=2 x+2y=10

step by step please? 
Matrices Limits Analysis

02/21/18

Tough analysis related question - please help!

Let A= a b           c  d   be an arbitrary 2x2 matrix. Let xn ⊆ R2 and suppose that (xn)→x for some x∈R2. Prove that (Axn)→Ax
Matrices

12/12/17

If Z and R are both inverse of matrix A, prove that Z=R

If Z and R are both inverse of the matrix A, prove that Z=R

solve the system of equations using the Gauss Jordan Method (2 problems)

label the augmented matrix(A:I), the resulting inverse(I:A^-1), column vector B, column vector of variables X, such that A^-1B=x   3x-5y=-5 6x-11y=-14     along with another problem which... more

10/31/17

Matrices to power

If you have (02 11) what is that 2x2 matrix to the power of 2? What is it to the power of 3?

for the following problem (Matrices)

represent the system of equations with a matrix, then convert to an upper triangular form and solve for variables with back substitution: A can is filled with 45 coins: half-dollars, quarters, and... more
Matrices

10/06/17

Danielle went to a pet store and bought 7 dogs and 5 cats for 760. If dogs cost twice as much as cats what is the cost of each?

whats the system of equation for it
Matrices Matrix

09/27/17

Finding an Unknown Matrix

A=1  -3     2   5 C=1 -1     -1  2(1) Find a matrix B such that AB=C (2) Find a matrix D such that DA=C
Matrices

07/18/17

if a= [0 1 2] and b= [3 2 1], then show that: (ab)'=b'a'

a is vertical mtx and b is horizontal mtx how to slve please explain
Matrices

07/16/17

Matrix multiplication

For the following matrices show that AB ≠ BA or that at least one of the products does not exist:   A=[[-1,0],[2,3]]   B=[[2],[0]]
Matrices

07/14/17

Are the defined?

Determine which if this operations with matrices is defined? 2A+E?    A=[[1,2][0,3]]    E=[[-1,0,2],[-1,0,3]]    

06/25/17

Use matrices with Gaussian elimination to solve the system of equations.

Use matrices with Gaussian elimination to solve the system of equations. (If there is no solution, enter NO SOLUTION. If there are infinitely many solutions, enter INFINITELY MANY.)   x + z = −4y... more
Matrices

06/01/17

How to find the missing matrix?

I need help finding f  in this equation:   2  3 4  5   x   f   =   12  16  10  15     IMPORTANT!!: CROSS PRODUCT NEEDS TO ME USED! NOT DOT PRODUCT!
Matrices

05/09/17

Simplifying matrices

Given that A and B are non-singular square matrices, simplify:   AB(A-1B)-1   (what does the question mean by square matrices?) 
Matrices

05/04/17

Finding 2 constants given two matrices

if A=(3   4) and B =(4   6).           (2  -3)             (3 -5)   (the brackets above represent one matrix, im just not sure how to write a matrix on this website)   and pA +qB = I (where I... more

SOLVING MATRIX ON A CALCULATOR

I1-I2-I3=0     1714I2+1000I3+250=0     -1714I2-2000I3+500=0

System of Equations word problem

During one game for the Phoenix Suns, Steve Nash scored 39 points on 17 field goals. How many of these field goals were 2-pointers and how many were 3-pointers?
Matrices

03/27/17

martrics question

Under the bracket of matrices ..  1/2.   2/5 2/5.     -1/5         Find its inverse..  
Matrices

03/18/17

Characteristic Roots Of The Matrix

I am supposed to find the characteristic roots of the matrixX= (-12 5 5 2)... how should I do that

Confusion with differential equation applied as a matrix

http://i.imgur.com/PknZsfZ.png   I'm confused on why the first row has values 0 + yk+1 + 0 and the second row has 0 + 0 + yk+2

02/26/17

Use matrices to find the general solution of the system, if a solution exists

2x - 5y + z =0 x + 4y - 6z =13 3x - 4y -2z =7 The system of equations may have a unique solution, an infinite number of solutions, or no solution. \ (If there is no solution, enter NO SOLUTION. If... more

01/17/17

Determine whether or not the determinant is 0.

Given a 3 × 3 matrix B with real entries, suppose that the system of linear equations determined by  B(x1 x2 x3) = (0 1 1) (they should be column matrices.) has infinitely many solutions. Determine... more

12/26/16

determining subspaces

determine if {A ∈ M3x3 (R) : Tr(A) = 0 } is a subspace of M3x3 (R)

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