Adding & Subtracting Matrices

Front

What must be true in order to ADD two matrices?

Back

The dimensions must be equal.

Front

How many rows are in a 7 x 3 matrix?

Back

7

Front

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

Back

[[6, 8], [10, 12]]

Front

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

Back

Not possible, dimensions do not match.

Front

What is a matrix?

Back

A rectangular array of numbers arranged in rows and columns.

Front

What is the condition for subtracting two matrices?

Back

The dimensions must be equal.

Front

If A = [[1, 2], [3, 4]] and B = [[5, 6], [7, 8]], what is A + B?

Back

[[6, 8], [10, 12]]

Front

If A = [[1, 2], [3, 4]] and B = [[5, 6], [7, 8]], what is A - B?

Back

[[-4, -4], [-4, -4]]

Front

What is the result of the scalar multiplication 3 * [[1, 2], [3, 4]]?

Back

[[3, 6], [9, 12]]

Front

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

Back

ad - bc