Quiz about Unit 3.7 Assignment

Question 1

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 2

What comes first in the order?

Accepted Answer

Row

Answer

Column

Question 3

What are the dimensions of this matrix?

Accepted Answer

3x1

Answer

1x3

Answer

3x3

Answer

1x1

Question 4

In Matrix R (pictured) what element is in the second row, third column?

Accepted Answer

6

Answer

8

Answer

9.01

Answer

1

Question 5

How many rows are in a 7 x 3 matrix?

Accepted Answer

7

Answer

3

Answer

21

Answer

10

Question 6

How many columns are in a 5 x 4 matrix?

Accepted Answer

4

Answer

5

Answer

20

Answer

9

Question 7

Calculate the determinant

Accepted Answer

0

Answer

none

Answer

-32

Answer

-8

Question 8

Systems of 3 Equations:
-x+6y-z=6
2x+y-3z=16
-x+5y+3z=-7

Accepted Answer

C (3, 1, -3)

Answer

A (0, -6, 0)

Answer

B (0, 0, -6)

Answer

D (-6, 4, -3)

Question 9

Is (-2,4) a solution to the system?

Hint: is it in the shaded area?

Accepted Answer

<p>Solution</p>

Answer

Not a solution

Question 10

Which of the following is not a method to solve systems?

Accepted Answer

Difference of Squares

Answer

Elimination

Answer

Substitution

Answer

Graphing

Question 11

Solve the system.

Accepted Answer

(-3, 2, -1)

Answer

(3, -2, 4)

Answer

(2, -3, 1)

Answer

Infinitely many solutions

Question 12

Solve the system.

Accepted Answer

(2, -2, 3)

Answer

(2, 1, 4)

Answer

(-2, 2, -3)

Answer

No Solution

Question 13

Determine which ordered triple is a solution of the systems of equations?
2x+y=0
x+3y-z=-11
7x+5y+4z=21

Accepted Answer

(1,-2,6)

Answer

(0,0,11)

Answer

(-1,2,-16

Answer

(0,1,-14)

Question 14

For the Summer Rock Festival, there is one price for students, one for adults, and another for senior

citizens. The Rueda family bought 3 student tickets and 2 adult tickets for $104. The Cosentinos bought 5

student tickets, 1 adult ticket, and 2 senior citizen tickets for $155. The Cragins bought 2 of each for $126. How much is each ticket?

Accepted Answer

Students $18

Adults $25

Seniors $20

Answer

Students $25

Adults $20

Seniors $18

Answer

Students $18

Adults $20

Seniors $25

Answer

Students $20

Adults $18

Seniors $25

Question 15

Ms. Mac went to Ulta to buy make up. She bought 15 items and spent $239.50. She bought concealors, eyeshadows, and lipsticks. Each concealor cost $21.50, each eyeshadow cost $10.50 and each lipstick cost $17.50. She bought 2 more lipsticks than eyeshadows. How many of each item did she buy?

Accepted Answer

concealors-3

eyeshadows-5

lipstick-7

Answer

concealors-5

eyeshadows-3

lipstick-7

Answer

concealors-7

eyeshadows-5

lipstick-3

Answer

concealors-3

eyeshadows-7

lipstick-3

Question 16

An MLB stadium sells three types of tickets. Reserved tickets are sold for $20 each, field level tickets are sold for $50 each, and box seat tickets are sold for $100 each. You purchase 10 total tickets for $370. You have twice as many reserved tickets as field level tickets. Set up the system using the variables

x: reserved

y: field-level

z: box seats

Accepted Answer

x+y+z=10

20x+50y+100z=370

x=2y

Answer

$x+y+z=370$
$20x+50y+100z=370$
$2x=y$

Answer

$x+y+z=370$
$20x+50y+100z=2$
$2z=x$

Question 17

Solve the system.

Accepted Answer

(5, -6, 3)

Answer

(2, 3, -1)

Answer

(-4, 2, 5)

Answer

No Solution

Question 18

Solve the following system by graphing.  What is the solution?

Accepted Answer

(4, 2)

Answer

(-4, 2)

Answer

(2, -4)

Answer

(2, 4)

Unit 3.7 Assignment

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics