Basics of Matrices

In Matrix R (pictured) what element is a₂₃?

• 8

• 9.01

• 6

• 1

Find the product of the two matrices.

• undefined

• -3   16
  17   12
  8   -10

• 3   12 
  -15  -8
  -1   -3

Find the product of the two matrices.

•   2
  6   -8

•   -5
  -5   -11

•     8
  -6   -12

• -3
  5   -2

These matrices are being multiplied. Determine the dimension/size of the new matrix.

• Can't multiply them

• 4  x  2

• 3  x  3

• 4  x  3

Find the determinant of the matrix

• A

• B

• C

• D

Evaluate the determinant. Type the answer in the space given. (Type the number ONLY.)

Evaluate the determinant. Type the answer in the space given. (Type the number ONLY.)

Evaluate the determinant. Type the answer in the space given. (Type the number ONLY.)

Find B-A

• -3     1
  7     -1

• 1     0
  1     -4

• 4       0
  -6     0

• not possible because rows do not match columns

Dimensions?

• a

• b

• c

• d