Identity and Inverse Matrix

What size is this matrix?

• 2x2

• 2x3

• 3x2

• 1x6

What is the formula for the determinant of a 2x2 matrix?

• ad-bc

• ab-cd

• ad+bc

• (a+d)(b+c)

What is the determinant of this matrix?

• 5

• -5

• 0

• -12

Will this matrix have an inverse?

• Yes

• No

• Unable to Determine

Tags

CCSS.HSA.REI.C.9

What is a₂₃

• 14

• 4

• 1

• 3

Tags

CCSS.HSA.REI.C.9

What is the inverse of this matrix?

• _{(1/25)  (-4/25)
  (3/25)  (13/25)}
• _{(1/5)  (-4/5)
  (3/5)  (13/5)}
• _{(6/25)  (-2/25)
  (2/25)  (9/25)}
• _{(1/150)  (-4/150)
  (3/150)  (13/150)}

Tags

CCSS.HSA.REI.C.9

Are these matrices inverses of each other?

• Yes

• No

• Unable to Determine

Tags

CCSS.HSA.REI.C.9

Find the inverse.

• A

• B

• C

• D

Tags

CCSS.HSA.REI.C.9