Quiz about Matrices

Question 1

Question 1.

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 2

Add

Accepted Answer

11 8 -4 2

Answer

3 2 -6 -6

Answer

-3 2 -4 -6

Answer

10 8 -6 2

Question 3

What is a Matrix?

Accepted Answer

A set of numbers in rows and columns

Answer

An equation of over 5 numbers or symbols

Answer

A method of finding the n^th value of a series

Answer

A complicated number system

Question 4

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 5

How many rows are in a 7 x 3 matrix?

Accepted Answer

7

Answer

3

Answer

21

Answer

10

Question 6

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 7

The number of columns in a 2x12 matrix is?

Accepted Answer

12

Answer

10

Answer

24

Answer

2

Question 8

Find B-A

Accepted Answer

4 0 -6 1

Answer

-4 0 6 -1

Answer

1 0 1 -4

Answer

not possible because rows do not match columns

Question 9

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 10

Perform the indicated operation

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Answer

not possible

Question 11

Perform the indicated operation

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Answer

not possible

Question 12

Find the sum of the matrices A = [[2, 3], [4, 5]] and B = [[1, 2], [3, 4]].

Accepted Answer

[[3, 5], [7, 9]]

Answer

[[1, 3], [2, 4]]

Answer

[[5, 7], [9, 11]]

Answer

[[6, 8], [10, 12]]

Question 13

Add

Accepted Answer

11 8 -4 2

Answer

3 2 -6 -6

Answer

-3 2 -4 -6

Answer

undefined

Question 14

Subtract

Accepted Answer

3 -4 8 -13

Answer

3 -8 0 -1

Answer

-3 8 0 1

Answer

3 -8 -8 1

Question 15

What are the dimensions of this matrix?

Accepted Answer

3 x 2

Answer

2 x 3

Answer

undefined

Answer

1 x 6

Question 16

Is the operation defined or undefined?

Accepted Answer

undefined

Answer

defined

Question 17

Find the product of the two matrices. (Multiply)

Accepted Answer

-3 -5
-5 -11

Answer

1 2 6 -8

Answer

-2 8
-6 -12

Answer

undefined

Question 18

Find the product of the two matrices. (Multiply)

Accepted Answer

-3 -5
-5 -11

Answer

1 2 6 -8

Answer

-2 8
-6 -12

Answer

2 -3 5 -2

Question 19

What are the dimensions of this matrix?

Accepted Answer

3x2

Answer

2x2

Answer

2x3

Answer

1x6

Question 20

What is the determinant of this matrix?

Accepted Answer

-2

Answer

2

Answer

10

Answer

24

Question 21

Solve the following system of equations.

-5x + 5y = -10

-7x + 4y = 13

Accepted Answer

(-7, -9)

Answer

(-7, -5)

Answer

(7, -9)

Answer

(-7, 5)

Question 22

David is running a concession stand at a soccer game. He sells nachos and sodas. Nachos cost $1.50 each and sodas cost $0.50 each. At the end of the game, David made a total of $78.50 and sold a total of 87 nachos and sodas combined.

Accepted Answer

35 nachos, 52 sodas

Answer

18 nachos, 69 sodas

Answer

52 nachos, 35 sodas

Answer

61 nachos, 26 sodas

Question 23

Find -3A

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

Does Not Exist

Question 24

Find -2C + 5D

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

Does Not Exist

Question 25

Evaluate the det (B).

Accepted Answer

-23

Answer

7

Answer

-7

Answer

23

Question 26

Homer sells tickets for admission to your school play and collects a total of $104. Admission prices are $6 for adults and $4 for children. He sold 21 tickets total. How many of each type of ticket were sold?

Accepted Answer

10 adults, 11 children

Answer

12 adults , 9 children

Answer

11 adults, 10 children

Answer

9 adults, 12 children

Question 27

Calculate the result of adding the matrices $$A = \begin{bmatrix} 1 & 3 \ 2 & 4 \end{bmatrix}$$ and $$B = \begin{bmatrix} 2 & 0 \ 1 & 3 \end{bmatrix}$$ .

Accepted Answer

$$\begin{bmatrix} 3 & 3 \ 3 & 7 \end{bmatrix}$$

Answer

$$\begin{bmatrix} 3 & 3 \ 4 & 6 \end{bmatrix}$$

Answer

$$\begin{bmatrix} 2 & 3 \ 3 & 7 \end{bmatrix}$$

Answer

$$\begin{bmatrix} 1 & 3 \ 3 & 7 \end{bmatrix}$$

Matrices

27 questions

Add

What is a Matrix?

Find A+B

How many rows are in a 7 x 3 matrix?

Multiply

The number of columns in a 2x12 matrix is?

Find B-A

What must be true in order to ADD two matrices?

Perform the indicated operation

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