AA - Unit 10 - Matrices

What is the name of each entry of a matrix?

• Row
• Element
• Dimension
• Rectangle

The dimensions of a matrix are written as

• number of rows x number of columns

• number of columns x number of rows

• a multiple

• a number

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

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

• 8
• 9.01
• 6
• None of these are accurate

In Matrix R (pictured) what is the value of element R_3,2

• 8
• 9.01
• 6
• None of these are accurate

What must be true in order to ADD two matrices?

• They must be square.
• The dimensions must be equal.
• The determinant has to be positive.

• The column of the 1st must equal the row of the 2nd.

C+B=?

• 
• 
• 
• You can't add them because they don't have the same dimensions.

How would a scalar multiplication be carried out for a matrix?

• Add the Scalar to every element in the matrix
• Subtract the elements in the first matrix from the elements of the second matrix
• Multiply every element with the scalar to create a new matrix that has the same dimensions.

• Multiply every element with the scalar to create a new matrix that has different dimensions.

What must be true in order to MULTIPLY two matrices?

• They must be square.
• The dimensions must be equal.
• The determinant can't equal 0.
• The #of columns of the 1st must equal the # of rows of the 2nd.

You can multiply a 2X3 matrix by which matrix?

• 2X2
• 2X12
• 3X12
• 2X3