Matrices

Front

What is a Matrix?

Back

An arrangement of numbers in rows and columns.

Front

What are the dimensions of a matrix?

Back

The dimensions of a matrix are defined by the number of rows and columns it contains.

Front

What must be true in order to ADD two matrices?

Back

The dimensions must be equal.

Front

How do you multiply a scalar with a matrix?

Back

Multiply each element of the matrix by the scalar.

Front

What is the result of multiplying a 2x3 matrix with a 3x2 matrix?

Back

A 2x2 matrix.

Front

How many columns are in a 5 x 4 matrix?

Back

4 columns.

Front

What is a square matrix?

Back

A matrix with the same number of rows and columns.

Front

What is the identity matrix?

Back

A square matrix with 1's on the diagonal and 0's elsewhere.

Front

What is the determinant of a 2x2 matrix?

Back

For a matrix [[a, b], [c, d]], the determinant is ad - bc.

Front

What is a zero matrix?

Back

A matrix in which all elements are zero.