Quiz 2 NUM10202

What is a Matrix?

• An equation of over 5 numbers or symbols 
• A set of numbers in rows and columns
• A method of finding the n^th value of a series
• A complicated number system

What is the order of given matrix

2 4 5 5 7

7 5 7 8 1

9 0 3 2 4

• 5 × 3

• 5 × 5

• 3 × 5

• 3 × 3

Which one comes first in the order of a matrix?

• Row

• Column

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

You can multiply a 2X3 matrix by which matrix?

• 2X2

• 2X12

• 3X12

• 2X3

• 3X2

Find the determinant of the matrix

• A
• B
• C
• D

When you multiply a matrix by the inverse matrix, you obtain the

• inverse matrix.

• transpose matrix.

• Identity matrix

• original matrix.

Find A+B

• 8     10
  8      1 
• 12     25
  7     1
• 10     30
  0     1
• can't add two together because the rows dont match columns

Subtract

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

What is the result of multiplying a 2 x 3 matrix by a 3 x 2 matrix?

• 2 x 2 matrix

• 3 x 3 matrix

• 2 x 3 matrix

• 3 x 2 matrix