Algebra 2 Final Exam Review

What is a square matrix?

• A matrix that has the same amount of rows and columns

• A matrix with no rows

• A matrix with no columns

• A matrix with 6 rows

In the matrix shown, what element is

 $a_{23}$  ?

• 3

• 6

• 2

• 4

When can matrices be added or subtracted?

• Only if they are square matrices

• They can never be added or subtracted

• They can anytime

• They must have the same dimensions

Tags

CCSS.HSN.VM.C.8

• 12 10

  1 7

• 4 9

  5 12

• 5 8

  8 9

• 5 0

  8 14

Tags

CCSS.HSN.VM.C.8

Is the sum defined?

• Yes, matrices can always be added

• No, because the matrices do not have the same dimensions

• No, because you cannot add positive and negative numbers

• Yes, the answer is 3

Tags

CCSS.HSN.VM.C.8

• 10 3

  -3 8

  14 2

• 4 3

  -3 8

  8 7

• -21 0

  -40 -9

  33 8

• 10 3

  13 10

  14 2

Tags

CCSS.HSN.VM.C.8

• 12 8

  6 5

• 20 6

  4 3

• 10 12

  8 6

• 20 12

  8 6

Tags

CCSS.HSN.VM.C.7

• 40 34

  -8 45

• 40 22

  -6 39

• 58 34

  -8 45

• 58 22

  -6 39

Dimensions?

• 1x4

• 2x2

• 4x1

• 3x1

• 10

• -7

• 7

• -10