Matrix Test Review

Determine whether the matrices are multiplicative inverses.

• Yes

• No

• Elevator

• Pi

Name the transformation for this matrix:

• Reflection across the line y=x

• Reflection across the y-axis

Dimensions?

• a

• b

• c

• d

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

Perform scalar multiplication on the matrix

• A

• B

• C

• D

Find the inverse of the matrix

• A

• B

• C

• D

Solve for matrix Z.

• 2
  3

• -2
  -3

• 18
  3

• 8
  4

find: B*A

• 47     30
  9     5

• 17     15
  42     35

• 10     25
  7     1

• not possible because rows do not match columns

Find the determinant of the matrix

• A

• B

• C

• D

In Matrix R (pictured) what element is in the second row, third column?

• 8

• 9.01

• 6

• 1