AnswersPrecalculusSolving Matrix Equations

Solving Matrix Equations — Unit test Answers

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1
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What is the determinant of ?

Question illustration
A
–24
B
–3
C
3
D
45
2
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What is the area of a triangle with vertices at (–3, 3), (2, 3), and (4, 7)?

A
5 square units
B
10 square units
C
20 square units
D
40 square units
3

The linear system below represents the sales of large and small popcorn servings at a movie theater for two consecutive days.What is the size of the augmented matrix for this system?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
4

What is the value of the element in row 1, column 1 of matrix X?

Question illustration
A
Option
Option A
B
4
C
8y
D
0
5

Which matrix will always give a determinant of 0?

A
a matrix having all nonzero numbers
B
a matrix not being the identity matrix
C
a matrix not having equal rows
D
a matrix having two equal rows
6

Matrix X is shown below.If matrices X and Y are equal, what is the value of

Question illustration
A
7.5
B
27
C
40
D
49.5
7

Which property is shown in the matrix addition below?

Question illustration
A
associative property
B
identity property
C
inverse property
D
commutative property

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