AR Do Now - Matrices 12-10-24

Front

What is a matrix?

Back

A matrix is a rectangular array of numbers arranged in rows and columns.

Front

How do you add two matrices?

Back

To add two matrices, add their corresponding elements. The matrices must have the same dimensions.

Front

How do you subtract two matrices?

Back

To subtract two matrices, subtract their corresponding elements. The matrices must have the same dimensions.

Front

What is matrix multiplication?

Back

Matrix multiplication involves multiplying rows of the first matrix by columns of the second matrix. The number of columns in the first matrix must equal the number of rows in the second.

Front

What is the result of adding the matrices [[1, 2], [3, 4]] and [[5, 6], [7, 8]]?

Back

The result is [[6, 8], [10, 12]].

Front

What is the result of subtracting the matrices [[5, 6], [7, 8]] from [[1, 2], [3, 4]]?

Back

The result is [[-4, -4], [-4, -4]].

Front

What is the result of multiplying the matrices [[1, 2], [3, 4]] and [[5, 6], [7, 8]]?

Back

The result is [[19, 22], [43, 50]].

Front

What is the identity matrix?

Back

The identity matrix is a square matrix with ones on the diagonal and zeros elsewhere.

Front

What is a zero matrix?

Back

A zero matrix is a matrix in which all elements are zero.

Front

What are the dimensions of a matrix?

Back

The dimensions of a matrix are given by the number of rows and columns it contains, expressed as 'rows x columns'.