matrices

What is the order of this matrix?

• 2 x 3

• 3 x 2

• 1 x 6

• 2

What must be true in order to ADD two matrices?

• The column of the 1st must equal the row of the 2nd.

• The determinant can't equal 0

• They must be square.

• They must have the same number of rows and columns

What are the values of w,x,y and z?

• w = 13, x = 4, y = 7, z = 23

• w = 13, x = -4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 23

• w = 13, x = 4, y = 11, z = 17

What are the values of m,n,p and q?

• m=8, n=9, p=-4, q=4

• m=15, n = -45, p=20, q=-5

• m=20, n=-5, p=15, q=-45

• m=-5, n=20, p=-45, q=15

• A

• B

• C

• D

Tags

CCSS.HSN.VM.C.8

The determinant of M is equal to y. What is the value of y?

• 2

• 3

• 0

• 1

Does this matrix have an inverse?

• yes

• no

• maybe

What is the inverse of the following matrix?

• 
• 
• 

Tags

CCSS.HSA.REI.C.9

When you multiply a matrix by the inverse matrix, you obtain the

• inverse matrix

• identity matrix

• transpose matrix

• determinant

Which of the following is the identity matrix?

• 
• 
• 
• none of the above