1.3 QUIZ Matrices

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.

Tags

CCSS.HSN.VM.C.8

What are the dimensions of matrix B?

• 2 x 3

• 3 x 2

• -8 x 10

• 3 x 3

Tags

CCSS.HSN.VM.C.6

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9

Add

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

Tags

CCSS.HSN.VM.C.8

Multiply -5 [5 -5 -1]

• [25 25 5]

• [-25 25 5]

• [-10 -10 -6]

• [10 10 6]

Tags

CCSS.HSN.VM.C.7

Can the operation be performed?

• Yes because there are 6 elements in each matrix

• No because the first matrix has negative elements

• Yes because the inner dimensions match even though the outer ones do not

• No because the dimensions don't match

Tags

CCSS.HSN.VM.C.8

Find A+B

• 8 10

  8 1

• 12 25

  7 1

• 10 30

  0 1

• undefined

Tags

CCSS.HSN.VM.C.8

Multiply

• 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

Name the dimensions.

• 2 x 4
• 4 x 2
• -2 x 6
• 1