Quiz about Complex Numbers. Matrices, & Vectors Review

Question 1

How do you write a complex number?

Accepted Answer

a+bi

Answer

a-bi

Answer

ai+b

Answer

ai-b

Question 2

(5-2i) + (-7+8i)

Accepted Answer

-2+6i

Answer

12+6i

Answer

-35-16i2

Answer

-35 -16i

Question 3

Simplify:
-3i(4 + 2i)

Accepted Answer

6 - 12i

Answer

6 + 12i

Answer

-12i - 6i²

Answer

-12i + 6i²

Question 4

Simplify:
(10+ 15i) - (48 - 30i)

Accepted Answer

-38 + 45i

Answer

58 - 45i

Answer

58 - 15i

Answer

-38 - 15i

Question 5

Question 5.

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 6

What is the complex conjugate of  4-3i?

Accepted Answer

D.  4 + 3i

Answer

A.  1/(4-3i)

Answer

B. 1/(4+3i)

Answer

C.  -4 + 3i

Question 7

i7

Accepted Answer

-i

Answer

i

Answer

1

Answer

-1

Question 8

What complex number is represented by the graph?

Accepted Answer

-3+i

Answer

-3-i

Answer

1+3i

Answer

1-3i

Question 9

What complex number is shown on the graph?

Accepted Answer

-2-3i

Answer

(-2,-3)

Answer

2-3i

Answer

3i-2

Question 10

What are the dimensions of this matrix?

Accepted Answer

3 x 2

Answer

2 x 3

Answer

6 x 1

Answer

1 x 6

Question 11

How is the entry of a matrix identified?

Accepted Answer

Row x Column

Answer

Column x Row

Answer

Row only

Answer

Column only

Question 12

Multiply

Accepted Answer

-20 15 -10
30 -5 0

Answer

20 15 -10
30 -5 0

Answer

1 8 3
11 4 5

Answer

20 -15 10
-30 5 0

Question 13

What do m, n, p and q equal in this scalar matrix multiplication?

Accepted Answer

m=15, n = -45, p=20, q=-5

Answer

m=8, n=9, p=-4, q=4

Answer

m=20, n=-5, p=15, q=-45

Answer

m=-5, n=20, p=-45, q=15

Question 14

Find A+B

Accepted Answer

8 10 8 1

Answer

12 25 7 1

Answer

10 30 0 1

Answer

can't add two together because the rows dont match columns

Question 15

Dimensions?

Accepted Answer

a

Answer

b

Answer

c

Answer

d

Question 16

Add

Accepted Answer

11 8 -4 2

Answer

3 2 -6 -6

Answer

-3 2 -4 -6

Answer

10 8 -6 2

Question 17

Subtract

Accepted Answer

-9 8 3 2

Answer

-5 -8 3 10

Answer

5 -8 3 10

Answer

-5 8 3 2

Question 18

Question 18.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 19

Question 19.

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 20

These matrices are being multiplied. Determine the dimension/size of the new matrix.

Accepted Answer

Can't multiply them

Answer

4  x  2

Answer

3  x  3

Answer

4  x  3

Question 21

Given matrices A & B:
A is a (4x33) matrix
B is a (33x1) matrix
What are the dimensions of the product of A times B?

Accepted Answer

4x1

Answer

4x33

Answer

33x1

Answer

Matrix does not exist

Question 22

What is the entry at f₄₂?

Accepted Answer

99

Answer

23

Answer

-81

Answer

-44

Answer

-56

Question 23

What is a₂₃

Accepted Answer

4

Answer

14

Answer

1

Answer

3

Question 24

What must be true in order to ADD two matrices?

Accepted Answer

The dimensions must be equal.

Answer

They must be square.

Answer

The determinant can't equal 0.

Answer

The column of the 1st must equal the row of the 2nd.

Question 25

Question 25.

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 26

Matrices can be multiplied only...

Accepted Answer

if the column of the first matrix is equal to the row of the second matrix.

Answer

if the row of the first matrix is equal to the column of the second matrix.

Answer

if the column of the first matrix is equal to the column of the second matrix.

Answer

if the row of the first matrix is equal to the row of the second matrix.

Question 27

A vector is a ray with both ____________ and _____________.

Accepted Answer

Direction and magnitude

Answer

Wings and halos

Answer

Space and time

Answer

Radicals and exponents

Question 28

Find the magnitude.

Accepted Answer

5

Answer

0

Answer

-5

Answer

4

Question 29

Find the magnitude.

Accepted Answer

5

Answer

3

Answer

25

Answer

-4

Question 30

Find the magnitude.

Accepted Answer

5

Answer

4

Answer

3

Answer

square root of 5

Question 31

Component Form

Accepted Answer

<7, 3>

Answer

<-3, -7>

Answer

<3, -7>

Answer

<-3, 7>

Question 32

Write in component form.

Accepted Answer

<8, 2>

Answer

<0, 4>

Answer

<2, 8>

Answer

<0, 2>

Question 33

Horizontal component

Accepted Answer

-18

Answer

5

Answer

18

Answer

-5

Question 34

Find the resultant vector.

Accepted Answer

<1, 7>

Answer

<5, 3>

Answer

<7, 1>

Answer

<3, 5>

Question 35

Find the resultant vector.

Accepted Answer

<11, 13>

Answer

<9, 15>

Answer

<7, 17>

Answer

<15, 9>

Question 36

Magnitude

Accepted Answer

Square root of 8

Answer

Square root of 15

Answer

4

Answer

0

Question 37

Find the magnitude of vector AB if the initial point is (-3, 1) and the terminal point is (3, 9).

Accepted Answer

10

Answer

6

Answer

8.2

Answer

10.4

Question 38

If w = <2, -5> and y = <2, 0>, find 2w + y

Accepted Answer

<6, -10>

Answer

<-10, 2>

Answer

<4, -5>

Answer

<-6, 10>

Complex Numbers. Matrices, & Vectors Review

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics