9th Grade Matrix

A matrix size or dimensions are

• Columns by rows

• Rows by columns

What is the name of each entry of a matrix?

• Row
• Element
• Dimension
• Rectangle

What must be true in order to ADD two matrices?

• They must be square matrices.

• The order of matrices must be equal.

• The determinant can't equal 0.

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

New matrix obtained by interchanging rows and columns is called........

• Rectangular

• Symmetric

• Transpose

• None of the above

How many rows would the transpose of a 3 x 7 matrix have?

• 3

• 4

• 7

• 21

A square matrix which has non zero elements in the leading diagonal is called...

• Diagonal Matrix

• Scalar Matrix

• Unit Matrix

• Symmetric Matrix

Identify the matrix

• Lower triangular

• Upper triangular

• scalar

• Unit

What is the dimension of this matrix?

• 2x4

• 4x2

• 4x4

• 2x2

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

• Add the Scalar to every element in the matrix
• Dot product the rows of one matrix with the columns of the other matrix
• Multiply every element with the scalar to create a new matrix
• subtract the elements in the first matrix from the elements of the second matrix

Tags

CCSS.HSN.VM.C.7

CCSS.HSN.VM.C.8

What must be true in order to MULTIPLY two matrices?

• They must be square.

• Their dimensions must be equal.

• The number of columns of the 1st matrix must equal the number of rows of the second.

• The number of rows of the 1st matrix must equal the number of columns of the second.