# 70-Algebra-2-Quest-ons

### QUESTION 1

1. Which of the following is the correct matrix representation of the children movie ticket sales for all three days?

 Ticket Sales for ThursdayChildren Adults Ticket Sales for FridayChildren Adults Ticket Sales for SaturdayChildren Adults Regular 257 183 355 402 398 423 Matinee 135 168 242 311 376 386

2 points

### QUESTION 2

1. What is the correct matrix for the inventory of flats in sizes 10 and 12.

 BootsBlue Gray FlatsBlue Gray SneakersBlue Gray Shoes Size 10 3 5 9 10 1 4 Shoes Size 12 2 0 2 7 4 0

2 points

### QUESTION 3

1. Evaluate
 Not possible

2 points

1. If B =
find -3B.

2 points

### QUESTION 5

1. Evaluate
 Not possible

2 points

### QUESTION 6

1. Matrix A has dimensions 5 x 4. Matrix B has dimensions 4 x 3. These two matrices can be multiplied.
 True False

2 points

### QUESTION 7

1. Matrix A has dimensions 3 x 2. Matrix B has dimensions 3 x 2. A x B will have dimensions 3 x 2.
 TRUE FALSE

2 points

1. Evaluate

2 points

### QUESTION 9

1. Evaluate
 Not possible

2 points

1. Evaluate

2 points

1. Evaluate

2 points

### QUESTION 12

1. Does the matrix have an inverse?
 yes no

2 points

### QUESTION 13

1. Does the matrix have an inverse?
 Yes No

2 points

### QUESTION 14

1. Find the determinant of
 0 1 -4 8

2 points

### QUESTION 15

1. Find the determinant of
 -10 6 10 18

2 points

### QUESTION 16

1. The following system of equations is consistent.
 True False

2 points

### QUESTION 17

1. The following system of equations is inconsistent.
 True False

2 points

### QUESTION 18

1. Does the following system have a solution?
 yes no

2 points

### QUESTION 19

1. Does the following system have a solution?
 yes no

2 points

### QUESTION 20

1. What is the approximate solution to the system of equations graphed below?
 (-2.6, 3.3) (-3.3, 3,3) (3.3, -2.6) (3.3, -3.3)

2 points

### QUESTION 21

1. What is the approximate solution to the system of equations graphed below?
 (1.1, 1.5) (1.5, 1.1) (0, -1) (2, 0)

2 points

### QUESTION 22

1. What is the approximate solution of the following system of equations?
 (-.7, -1.7) (.7, 1.7) (.7, -1.7) (-.7, 1.7)

2 points

### QUESTION 23

1. Solve 4x + 3y = 13 x + y = 4by the substitution method.
 (3, 1) (0, 4) (3, 0) (1, 3)

2 points

### QUESTION 24

1. Solve the following system of equations by using the substitution method.
x = 4 â€“ 2y
4x + 8y = 20

 Consistent (4, 0) (0, 2) Inconsistent

2 points

### QUESTION 25

1. Solve the following system of equations by using the substitution method.
x = y + 3
2x + y = 9

 (4, 1) (5, 2) (3, -2) Inconsistent

2 points

### QUESTION 26

1. Solve y = 3x â€“ 122x â€“ 3y = -13by the substitution method.
 (2, -6) (7, 9) (0, -12) (5, 3)

2 points

### QUESTION 27

1. What would be the first step to solve this system of equations by the Substitution Method?
3x + 4y = -1
x + 3y = 3

 Solve the second equation for x. Divide the first equation by 4. Add the two equations together. Multiply the second equation by -3.

2 points

### QUESTION 28

1. What would be the first step to solve this system of equations by the Substitution Method?
x + y = -1
6x â€“ 2y = 18

 Multiply the first equation by 2. Solve the first equation for x. Multiply the second equation by 3. Add the two equations together.

2 points

### QUESTION 29

1. What would be the first step to solve this system of equations by the Substitution Method?
10x â€“ 2y = 8
4x â€“ 10y = -6

 Add the two equations together. Solve the first equation for y. Multiply the first equation by -5 Multiply the second equation by 5

2 points

### QUESTION 30

1. Solve 9x + 2y = 2
21x + 6y = 4
by the elimination methods.