109 Answered Questions for the topic Linear

10/19/14

Find the angle alpha between the vectors

Find the angle between the vectors  [-3  3] and  [-5   5]    

10/19/14

Find the dot product of x and y

Let x = [-4, 4,5] and y=[0,0,-3] Find the dot product of x and y x.y=?

10/19/14

Find the vector w=2u-3v and its additive inverse.

Let u=(1,-1,0) and v=(1,-2,-3). Find the vector w=2u-3v and its additive inverse. w= -w=  

10/19/14

Find the angle between the vectors

Find the angle between the vectors  [1  4 -5]   and [5 -5 4]

10/16/14

Find all 2x2 matrices

Find all 2x2 matrices A that are symmetric and whose squares are equal to themselves

10/05/14

Find the inverse of the (common) coefficient matrix of the two systems.

Consider the following two systems -6x-y=2 2x-9y=3     -6x-y=3 2x-9y=2   Find the inverse of the (common) coefficient matrix of the two systems. A-1=?

10/01/14

enter a 3x3 skew symmetric matrix A

enter a 3 times 3 skew-symmetric matrix A that has entries a21=0, a13=1, a32=2.    

09/22/14

Solve the equation

Solve the equation 8x+3y-5z=16 what is x? what is y? what is z?  

09/22/14

solve the system using a matrix

Solve the system using a MATRIX x1+2x2-2x3-2x5+4x6=-4-x4-3x5+2x6=9x1+2x2+6x5+6x6=0 x1=?x2=?x3=?x4=?x5=?x6=?

09/18/14

Solve the system using a matrix

Solve the system  x1+2x2-2x3-2x5+4x6=-4 -x4-3x5+2x6=9 x1+2x2+6x5+6x6=0   x1=? x2=? x3=? x4=? x5=? x6=?

09/18/14

Solve the equation using matrices

8x+3y-5z=16 x= y= z=

09/18/14

Solve the system using a matrix 1

Solve the system x1+x2-4x3=3 3x1+4x2+3x3=-8   x1= x2= x3=

09/16/14

Solve the system

Solve the system  x1+x2-4x3=3  3x1+4x2+3x3=-8   x1=? x2=? x3=?

09/15/14

Solve the system

x1+x2=-4 x2+x3=-4 x3+x4=4 x1+x4=4   x1= x2= x3= x4=

09/15/14

Solve the system

4x1+x2=-3 8x1+2x2=-6   x1= x2=  

09/14/14

determine the value of k for which the system has no solutions

determine the value of k for which the system  x+y+5z=-3 x+2y-2z=3 4x+11y+kz=31 has no solutions.    k=?

09/14/14

Determine the value of h such that the matrix is the augmented matrix of a consistent linear system.

   8   -6   h -24   18  3   h=?

09/14/14

Solve the system

4  1  -3 8  2  -6   x1= x2=  

09/11/14

Solve the system

x1+x2=-4 x2+x3=-4 x3+x4=4 x1+x4=4    

09/11/14

Solve the system by finding the reduced row-echelon form of the augmented matrix.

Solve the system by finding the reduced row-echelon form of the augmented matrix.x+2y-4z=-4 -x-y+3z=2 x+3y-5z=-6 How many solutions are there to this system?

09/11/14

Reduce the matrix to reduced row-echelon form

-3 1 -3 21  2  3  3 -6 2  0 -3 3

09/11/14

Solve the system

Solve the system  4x1+x2=-3 8x1+2x2=-6 x1= x2=

09/10/14

Solve the system by finding the reduced row-echelon form of the augmented matrix.

x+2y-4z=-4 -x-y+3z=z x+3y-5z=-6   How many solutions are there to this system?

09/10/14

Reduce the matrix to reduced row-echelon row

-3  1  -3  21  2  3   3  -6  2  0  -3  3  

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