159 Answered Questions for the topic Matrix

03/22/20

Find a real number x where the matrix has a rank equal to 1.
The matrix is: [ 2 2 0 ] [ 1 1 0 ] [ -1 x 0 ]
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03/22/20

Compute the rank and nullity of each matrix
1. [ -2 4 ] [ 1 5 ] 2. [ 1 2 -1 ] [ -2 -4 2 ]
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03/04/20

Inverse Matrix Question
Suppose X and Y are both invertible matrices, and W is a block matrix: W = [ X Z ] [ 0 Y ] Show that W is invertible, and its inverse is:[ X-1 -X-1ZY-1 ] = W-1[ 0 Y -1 ]
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03/04/20

Finding the Inverse of a Matrix
Suppose x ∈ R.Find the inverse of the following matrix: A = [ 1 1 1 ] [ 0 1 1 ] [ x 0 1 ]
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03/04/20

Row Equivalent Matrices
Determine whether or not the two matrices are row equivalent: matrix one: [ 1 2 1 ] [ 1 -1 1 ] [ 2 1 2 ] matrix two: [ 0 -2 0 ] [ 1 1 1 ] [ 1 0 1 ]
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03/04/20

Inverse Matrices
Find the inverse of the following matrices if it exists: 1. [ 1 -2 ] [ -3 5 ] 2. [ -2 0 2 ] [ 4 -2 -1 ] [ 0 2 -2 ]
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02/14/20

SYSTEM: Solve the system using the indicated method. HELP ME PLEASE!!
Solve the following system using Gaussian elimination.       x + 2y − 2z = 0 3x + 5y − 3z = 20-4x − 3y +  z = -28
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02/14/20

HELP ME PLEASE!!! MATRIX OPERATION: Perform the indicated operation using the given matrices.
 Find the inverse of A given that |A| = 5.( I don't understand this)
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02/13/20

Solve the system using Gaussian elimination and back-substitution. Help me please... this is all confusing

 -x + 3y −  z = -9  x − 2y + 2z = 8 2x −  y +  z = 7
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02/13/20

Convert the given matrix to a system of equations. HELP ME PLEASE!! I'M SO CONFUSED!!
 (Eq1)           (Eq2)          (Eq3) 
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02/13/20

Convert the system to an augmented matrix. PLEASE HELP ME!
2x +  y = 74x − 5y = 2   the boxes are just for the answers
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02/12/20

Choose the description to match the correct matrix.
coefficient matrixA.  B. C. D. E. PreviousPowered
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02/11/20

Identify the indicated element from the given matrix. HELP PLEASE!!
   a23     
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02/11/20

What is the size of the product matrix when a 2 × 3 matrix is multiplied by a 3 × 2 matrix?
A. 2 × 2B. 2 × 3C. 3 × 2D. 3 × 3
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01/30/20

Linear Transformation and Standard Matrix
Let T: R2-> R2 be the linear transformation with the property: T(1, 0) = (4, -1) and T(2, 1) = (6, 1)Find [T], the standard matrix of T
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01/30/20

True or False: Linear Transformation & Matrix
Determine which are true and which are false:A) If there is a path of lenght 2 between two specific vertices in an undirected graph, then there must be a path of lenght 3 between those two... more
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01/24/20

Matrix Problem Questions
The following list describes the flight routes between the cities:H is connected to T, HX, and MN.T is connected H, SJ, HX, MN, and ML.ML is connected to T, SJ, HX, and MN.SJ is connected to T, and... more
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01/23/20

Matrix True and False Questions
a) If A and B are n x n matrices then (AB)2 =A2B2b) If the product of two matrices AB is square, then A and B must be square.c) If A and B are matrices with sizes such that AB is square, then BA... more
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09/30/19

When do you need to find the Inverse in order to solve a system of equations?
In class we learned how to solve a system of equations by using a matrix and performing the gauss-jordan elimination method. We also learned a method where you use the gauss-jordan method to find... more
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09/01/19

Prove matrix det(cos x cos z 1, cos y 1 cos z, 1 cos y cos x) = 0 if x+y+z= 2 pi
Prove matrix det(cos x cos z 1, cos y 1 cos z, 1 cos y cos x) = 0 if x+y+z= 2 pi
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05/01/19

if the three schools have a total enrollment of 96,000 students, what is the enrollment at each school?
The University of Texas at Austin has three times as many students enrolled as the University of Miami. The University of California, Berkley has 3,000 more than twice the number of students as the... more
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Matrix Precalculus

04/26/19

The sizes of two matrices A and B are given.
Find the sizes of the product AB and the product​ BA, whenever these products exist. A is 4x2, and B is 2x4
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Matrix Algebra 2

03/23/19

Determine if the equation Ax = b is consistent for all possible b1 and b2
Let A = -3 3 3 3  and  b = b1 b2 Determine if the equation Ax = b is consistent for all possible b1 and b2 . If the equation is... more
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03/20/19

Math question on Ratios problem solving
The ratio of the age of Bob to her mother in 2001 was 1:11The ratio of the age of Bob to her mother in 2018 was 2:5What will be the ratio of Bob's age to her mother in 2030?
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Matrix Algebra 2

02/19/19

How to determine 2 unknown value in a 3 x 3 matrix
How to solve the following question2 2 0 X = 0P 2 0 Y = 0Q -1 -1 Z =0
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