Matrices Warm-Up

Front

How many columns are in a 5 x 4 matrix?

Back

4

Front

What is the name of each entry of a matrix?

Back

Element

Front

What is the result of adding two matrices of the same dimension?

Back

The sum of the corresponding elements.

Front

What is the condition for two matrices to be added?

Back

They must have the same dimensions.

Front

What is the result of subtracting matrix A from matrix B if A and B are both 2x2 matrices?

Back

Subtract corresponding elements.

Front

In a matrix, what does the term 'dimension' refer to?

Back

The number of rows and columns in the matrix.

Front

What is the value of element R₁₃ in matrix R if R = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]?

Back

3

Front

What is the product of a 2x3 matrix and a 3x2 matrix?

Back

A 2x2 matrix.

Front

What is the determinant of a 2x2 matrix [[a, b], [c, d]]?

Back

ad - bc.

Front

What is the identity matrix of size 3x3?

Back

[[1, 0, 0], [0, 1, 0], [0, 0, 1]]