6.1Add/Subtract/Scalar Multiplication/Dimensions of Matrices

What is the sum of the matrices: -4 -6 and 10 8?

• 4 2

• 6 2

• 5 3

• 7 1

State the dimensions of a 3 x 2 matrix.

• 2 rows and 3 columns.

• 3 rows and 2 columns.

• 4 rows and 2 columns.

• 3 rows and 3 columns.

What is the difference when subtracting the matrices: 11 8 -4 2 and 3 2 -6 -6?

• 8 6 2 8

• 7 6 1 8

• 8 5 2 7

• 9 6 3 8

What is scalar multiplication in matrices?

• Multiplying each element of a matrix by a scalar (a constant number).

• Adding a scalar to each element of a matrix.

• Multiplying two matrices together.

• Dividing each element of a matrix by a scalar.

What is a Matrix?

• A collection of random numbers.

• A set of numbers arranged in rows and columns.

• A type of computer program.

• A geometric shape defined by points.

What is the result of the scalar multiplication of the matrix 1 2
3 4 by 2?

• 2 4
  6 8.

• 1 2
  3 4.

• 4 8
  12 16.

• 0 0
  0 0.

If you multiply a 2 x 3 matrix by a scalar 4, what are the dimensions of the resulting matrix?

• 2 x 3

• 3 x 2

• 4 x 3

• 2 x 4

What is the result of adding the matrices: 2 3 4 5 and 1 1 1 1?

• 3 4 5 6

• 2 3 4 5

• 4 4 5 5

• 3 5 5 7

What is the result of adding the matrices: 1 2 3 4 and 5 6?

• 6 8 8 10

• 5 7 8 10

• 6 8 7 9

• 7 8 9 10

How many rows are in a 7 x 3 matrix?

• 5 rows

• 6 rows

• 7 rows

• 8 rows