matrices practice test

matrix A order is 3 x 4 and B order is 4 x 2, the order of AB is?

• 3 x 2

• 4 x 4

• AB is not possible because the number of columns in the first matrix does not equal the rows in the second matrix

• 2 x 2

Tags

CCSS.HSN.VM.C.8

What is the entry at r₃₁?

• 3

• 1

• 4

• 7

What must be true in order to ADD two matrices?

• They must be square.

• The dimensions must be the same.

• The determinant can't equal 0.

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

Tags

CCSS.HSN.VM.C.8

Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

Tags

CCSS.HSN.VM.C.8

Find A+B

• 8     10
  8      1 
• 12     25
  7     1
• 10     30
  0     1
• can't add two together because the rows dont match columns

Tags

CCSS.HSN.VM.C.8

Multiply by the scalar

• 20 15 -10

  30 -5 0

• -20 15 -10

  30 -5 0

• 1 8 3

  11 4 5

• 20 -15 10

  -30 5 0

Tags

CCSS.HSN.VM.C.7

Is this possible?

• Yes
• No

Tags

CCSS.HSN.VM.C.8

State if an inverse exists.

• yes
• no

Tags

CCSS.HSA.REI.C.9

The matrix shown is described as:

• an identity matrix

• a column matrix

• a row matrix

• a zero matrix

Tags

CCSS.HSN.VM.C.6

The following matrices multiplication would result in the following product:

• 
• 
• 
• 

Tags

CCSS.HSN.VM.C.8