Unit 9 Day 1 Classwork

Front

What is a matrix?

Back

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

Front

How do you identify the dimensions of a matrix?

Back

The dimensions of a matrix are given as 'rows x columns'. For example, a 3 x 2 matrix has 3 rows and 2 columns.

Front

What is the element in the second row, third column of a matrix?

Back

To find the element in the second row, third column, locate the second row and then the third column.

Front

If a matrix has dimensions 5 x 4, how many columns does it have?

Back

A 5 x 4 matrix has 4 columns.

Front

What does the notation a_ij represent in a matrix?

Back

The notation a_ij represents the element in the i-th row and j-th column of a matrix.

Front

How do you perform matrix subtraction?

Back

To subtract two matrices, subtract corresponding elements from each other.

Front

What is the result of subtracting the matrices [[3, -8], [0, 1]] and [[-8, 1], [3, -4]]?

Back

The result is [[11, -9], [-3, 5]].

Front

What is the value of element a₂₃ in a matrix?

Back

Element a₂₃ is the value located in the second row and third column of the matrix.

Front

What is the difference between a row and a column in a matrix?

Back

A row is a horizontal line of elements, while a column is a vertical line of elements.

Front

How do you find the total number of elements in a matrix?

Back

Multiply the number of rows by the number of columns.