Matrices

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• 6 x 1

• 1 x 6

Can the operation be performed?

• Yes

• No

• Sometimes

• only Mrs. Parker knows

What must be true in order to ADD two matrices?

• They must be square.

• The dimensions must be equal.

• The determinant can't equal 0.

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

You can multiply a 6X2 matrix by which matrix?

• 6X2

• 2X12

• 3X12

• 6x3

These matrices are being multiplied. Determine the dimension/size of the new matrix. 

• Can't multiply them

• 4  x  2

• 3  x  3

• 4  x  3

What do w, x, y and z equal in this matrix subtraction?

• 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 do m, n, p and q equal in this scalar matrix multiplication?

• 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

Find the determinant of the following matrix.

• -12

• -10

• 12

• 10

Find the determinant of the following matrix.

• 
  

  $\frac{-1}{4}$
  

• $\frac{1}{4}$

• $\frac{-1}{8}$

• $\frac{1}{8}$

What is a₂₃

• 14

• 4

• 1

• 3