Matrix Test Review

Dimensions?

• a
• b
• c
• d

find: B*A

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

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

Perform scalar multiplication on the matrix

• A
• B
• C
• D

Tags

CCSS.HSN.VM.C.7

Find the inverse of the matrix

• A
• B
• C
• D

Tags

CCSS.HSA.REI.C.9

Find the determinant of the matrix

• A
• B
• C
• D

Add

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

Tags

CCSS.HSN.VM.C.8

Multiply

• 25
  25
  5
• -25
  25
  -5
• -10
  -10
  -6
• 10
  10
  6

Tags

CCSS.HSN-VM.B.5A

CCSS.HSN-VM.B.5B

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

Solve the system using a matrix.
-5x + 5y = -10
-7x + 4y = 13

• (-7, -5)
• (-7, -9)
• (7, -9)
• (-7, 5)

Tags

CCSS.HSA.REI.C.9