14. Matrices and Networks

14.01 Representing information using matrices

14.02 Matrix addition, subtraction and scalar multiplication

14.03 Matrix multiplication

14.04 Inverse of a matrix

14.05 Matrices and simultaneous equations

14.06 Introduction to networks

14.07 Project networks

Middle Years

14.01 Representing information using matrices

Interactive practice questions

Answer the following questions.

a

What is the definition of a matrix?

A rectangular array of only whole numbers.

A

A triangular array of real numbers or symbols.

B

A rectangular array of real numbers, symbols, and expressions.

C

A rectangular array of only real numbers.

D

b

What is a square matrix?

A matrix that contains the same number of rows as columns.

A

A matrix that contains more columns than rows.

B

A matrix that contains more rows than columns.

C

Easy

< 1min

Is the array

		$2$2	$3$3
		$5$5	$-5$−5
		$7$7	$-8$−8

a matrix?

Easy

< 1min

Is the array

		$-1$−1	$-6$−6
		$-5$−5	$8$8
		$-2$−2	$\ $

a matrix?

Easy

< 1min

How many elements does a matrix with $4$4 rows and $5$5 columns contain?

Easy

< 1min

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