Introduction to Matrices

How many rows does the above matrix have?

• 1

• $1\times3$
  

• $3\times1$

• 3

What is the second element of the second column?

• -10

• 8

• 25

• 3

How many rows does the above matrix have?

• 1

• $1\times3$
  

• $3\times1$

• 3

The matrix above is named A. AB is possible only if B has

• 1 row

• 1 column 

• 3 rows

• 3 columns

Tags

CCSS.HSN.VM.C.8

The 2 x 2 identity matrix under addition is

• 
• 
• 
• 

Tags

CCSS.HSN.VM.C.10

The order of the above matrix is

• $2\times1$

• $1\ \times\ 3$

• $1\times2$

• $2$

The matrix above can only be added to another matrix which has

• 2 elements

• 2 columns

• order  $2\ \times\ 1$  

• order $1\times2$   

Tags

CCSS.HSN.VM.C.8

The sum of the two matrices above is equal to

• The inverse matrix

• The identity matrix

• The diagonal matrix

• The unit matrix

Tags

CCSS.HSN.VM.C.8

The order of the above matrix is

• $1\times1$

• $0\times1$

• $1\times0$

• $0\times0$

What is the third element of the first column?

• 1

• -x

• 100

• 3