Intro to Matrix

What is a matrix?

• A set of imaginary numbers

• A set of real numbers arranged in rows and columns

• A single number

• A set of complex numbers

What is the major application of matrix algebra?

• Solving systems of linear equations

• Graphing functions

• Solving quadratic equations

• Finding derivatives

What is the order of a matrix?

• Number of rows and columns

• Number of variables

• Number of elements

• Number of diagonals

What are the elements of a matrix called?

• Coefficients

• Variables

• Digits

• Entries

What type of matrix has all its elements equal to zero?

• Diagonal Matrix

• Scalar Matrix

• Identity Matrix

• Null Matrix

What type of matrix has equal number of rows and columns?

• Column Matrix

• Square Matrix

• Rectangular Matrix

• Row Matrix

What type of matrix has all the non-diagonal elements equal to zero?

• Identity Matrix

• Scalar Matrix

• Rectangular Matrix

• Diagonal Matrix

How do you add or subtract matrices?

• By adding or subtracting corresponding elements

• By multiplying elements

• By finding the square root

• By dividing elements

What is the result of adding matrix A and matrix B if A = [2 4; 1 7] and B = [9 5; 0 3]?

• [7 9; 1 10]

• [7 9; 2 10]

• [11 9; 1 10]

• [11 9; 2 10]

What is the result of subtracting matrix Y and matrix Z if Y = [6 0; 4 3; -2 8] and Z = [8 5; 1 2; -4 -2]?

• [2 -5; 3 1; 2 10]

• [2 -5; 3 1; 8 10]

• [2 -5; 3 1; 6 10]

• [2 -5; 3 1; 4 10]