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Teaching Since:	May 2017
Last Sign in:	352 Weeks Ago, 4 Days Ago
Questions Answered:	20103
Tutorials Posted:	20155

Education

MBA, PHD
Phoniex
Jul-2007 - Jun-2012

Experience

Corportae Manager
ChevronTexaco Corporation
Feb-2009 - Nov-2016

Category > Engineering Posted 19 Sep 2017 My Price 15.00

70 Algebra 2 Questıons

QUESTION 1

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

Ticket Sales for Thursday
Children Adults
Ticket Sales for Friday
Children Adults
Ticket Sales for Saturday
Children Adults

Regular 257 183 355 402 398 423

Matinee 135 168 242 311 376 386

2 points

QUESTION 2

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

Boots
Blue Gray Flats
Blue Gray Sneakers
Blue Gray

Shoes Size 10 3 5 9 10 1 4

Shoes Size 12 2 0 2 7 4 0

2 points

QUESTION 3

Evaluate

Not possible

2 points

QUESTION 4

If B =
find -3B.

2 points

QUESTION 5

Evaluate

Not possible

2 points

QUESTION 6

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

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

QUESTION 8

Evaluate

2 points

QUESTION 9

Evaluate

Not possible

2 points

QUESTION 10

Evaluate

2 points

QUESTION 11

Evaluate

2 points

QUESTION 12

Does the matrix have an inverse?

yes

no

2 points

QUESTION 13

Does the matrix have an inverse?

Yes

No

2 points

QUESTION 14

Find the determinant of

0

1

-4

8

2 points

QUESTION 15

Find the determinant of

-10

6

10

18

2 points

QUESTION 16

The following system of equations is consistent.

True

False

2 points

QUESTION 17

The following system of equations is inconsistent.

True

False

2 points

QUESTION 18

Does the following system have a solution?

yes

no

2 points

QUESTION 19

Does the following system have a solution?

yes

no

2 points

QUESTION 20

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

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

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

Solve 4x + 3y = 13 x + y = 4by the substitution method.

(3, 1)

(0, 4)

(3, 0)

(1, 3)

2 points

QUESTION 24

Solve the following system of equations by using the substitution method.
x = 4 – 2y
4x + 8y = 20

Consistent

(4, 0)

(0, 2)

Inconsistent

2 points

QUESTION 25

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

Solve y = 3x – 122x – 3y = -13by the substitution method.

(2, -6)

(7, 9)

(0, -12)

(5, 3)

2 points

QUESTION 27

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

What would be the first step to solve this system of equations by the Substitution Method?
x + y = -1
6x – 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

What would be the first step to solve this system of equations by the Substitution Method?
10x – 2y = 8
4x – 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

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

(3, -2)

(-3, 2)

2 points

QUESTION 31

Solve the following system of equations by using the elimination method.
x + y = 4
2x + 3y = 9

(3, 1)

(-2, 1)

(3, -1)

Inconsistent

2 points

QUESTION 32

Solve the following system of equations by using the elimination method.
2x – 4y = 8
3x + 8y = -2

(1, 3)

(4, 5)

(2, -1)

(-2, -1)

2 points

QUESTION 33

Solve the following system of equations by using the elimination method.
2x + 6y = 4
3x – 2y = -16

(-4, 2)

(2, -4)

2 points

QUESTION 34

What would be the first step to solve this system of equations by the Elimination Method?4y = 28
3x – 2y = -14

Multiply the second equation by 2.

Solve the first equation for y.

Solve the second equation for x

Add the two equations together.

2 points

QUESTION 35

What would be the first step to solve this system of equations by the Elimination Method?
10x – 2y = 8
4x – 10y = -6

Add the two equations together.

Solve the first equation for y.

Multiply the first equation by -5

Solve the second equation for x.

2 points

QUESTION 36

What would be the first step to solve this system of equations by the Elimination 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 37

Solve the following system of equations using matrices.
y = 2x – 2
3x – 6y = -6

(1, 0)

(3, 4)

(-2, -2)

(2, 2)

2 points

QUESTION 38

Solve 7x + 5y = 14
4x + 3y = 9
using matrices.

(7, -3)

(-3, 7)

(3, -7)

(7, 3)

2 points

QUESTION 39

Solve
8x + 7y = 5
4x – 9y = 65
using matrices.

(5, -5)

(5, 65)

(7, -7)

(65, 5)

2 points

QUESTION 40

The degree measure of one of two complementary angles is 30 less than twice that of the other. What are the degree measures of the angles? (Remember that complimentary angles add to be 90 degrees)

45 degrees and 45 degrees

30 degrees and 60 degrees

27 degrees and 63 degrees

40 degrees and 50 degrees

2 points

QUESTION 41

A collection of nickels and dimes is a total value of $2.00 and contains 25 coins. How many of each coin is in the collection?

9 dimes and 16 nickels

11 dimes and 14 nickels

13 dimes and 12 nickels

15 dimes and 10 nickels

2 points

QUESTION 42

Which of the following is a solution to the following system of inequalities?

(1, 1)

(-4, 0)

(3, -3)

(0, 5)

2 points

QUESTION 43

Which of the following is NOT a solution to the system of inequalities?

(2, 3)

(1, 3)

(0, 3)

(0, 4)

2 points

QUESTION 44

What is the system of inequalities associated with the following graph?

x + y > 2
4x + y > -1

x + y = 2
4x + y = -1

x + y < 2
4x + y < -1

x + y = 2
4x + y = -1

2 points

QUESTION 45

What is the system of inequalities associated with the following graph?

2x – y > -3
x > 1

2x – y < -3
x > 1

2x – y > -3
x = -3

2x – y > -3
x = 1

2 points

QUESTION 46

Solve 3x – y + 2z = 9
x – 2y – 3z = -1
2x – 3y + z = 10
using matrices.

(9, -1, 10)

(1, 2, 2)

(1, 2, -2)

(1, -2, 2)

2 points

QUESTION 47

Solve 4x = 5y + 10
z = y – x
3x + 4y = 20 + z

(5, 2, 3)

(5, 2, -3)

(2, 5, -3)

(2, 5, 3)

2 points

QUESTION 48

Solve 3x – 2y + z = -5
-2x + 3y – 3z = 12
3x – 2y – 2z = 4
using matrices.

(1, 0, -3)

(1, -3, 0)

(0, 1, -3)

(0, -3, 1)

2 points

QUESTION 49

The sum of three numbers is 11. If you triple the second number and add the third number, the result will be equal to the first number. The first number is two times the second number. What are the numbers?

		1st number = 9, 2nd number = 6, 3rd number = -4
		1st number = 10, 2nd number = 5, 3rd number = 4
		1st number = 10, 2nd number = 5, 3rd number = 14
		1st number = 10, 2nd number = 5, 3rd number = -4

2 points

QUESTION 50

The largest angle in a triangle is equal to the sum of the two other angles. The middle angle is twice the measure of the smallest angle. What is the measure of each angle?

32°, 64°, 90°

30°, 60°, 80°

30°, 60°, 90°

30°, 60°, 101°

2 points

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QUESTION 1

What is the radius of the following circle?

–1

1

–2

2

2 points

QUESTION 2

What is the equation of the following circle?

(x + 1)2 + (y + 1)2 = 36

(x + 1)2 – (y + 1)2 = 36

(x – 1)2 + (y – 1)2 = 36

(x – 1)2 – (y – 1)2 = 36

2 points

QUESTION 3

What is the center of the following circle?

(–1, –4)

(1, 4)

(4, 1)

(–4, –1)

2 points

QUESTION 4

What is the radius of the following circle?

25

16

10

5

2 points

QUESTION 5

What is the radius of the following circle?

8

10

–5

5

2 points

QUESTION 6

Write the equation of a circle with a center at (0, 3) and a radius of 1.

x2 + (y – 3)2 = 1

x2 + (y – 3)2 = 2

x2 + (y + 3)2 = 1

x2 + (y + 3)2 = 2

2 points

QUESTION 7

Write the equation of a circle with a center at (–5, –5) and a diameter of 13.

(x – 5)2 + (y – 5)2 = 42.25

(x + 5)2 + (y + 5)2 = 169

(x + 5)2 + (y + 5)2 = 13

(x + 5)2 + (y + 5)2 = 42.25

2 points

QUESTION 8

Write the equation of a circle with a center at (–2, –5) and a radius of 6.5.

(x + 2)2 + (y + 5)2 = 6.5

(x – 2)2 + (y – 5)2 = 42.25

(x – 2)2 + (y – 5)2 = 6.5

(x + 2)2 + (y + 5)2 = 42.25

2 points

QUESTION 9

Write the equation of a circle with a center at (0, 0) and a radius of 2.

x2 + y2 = 2

x2 + y2 = 4

x2 – y2 = 4

x2 – y2 = 2

2 points

QUESTION 10

What is the point of symmetry for the circle (x – 5)2 + (y + 4)2 = 25?

(–5, –4)

(5, –4)

(–4, 5)

(4, –5)

2 points

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QUESTION 1

Find the mean of the following set of data. Round your answer to two decimal places.
23, 50, 49, 48, 49, 32, 37, 40, 41, 42, 41, 41, 43

41.23

44.67

48.72

49.23

2 points

QUESTION 2

Find the mean of the following set of data. Round your answer to two decimal places.
$12.50, $13.23, $11.20, $14.50, $12.50, $13.23, $15.60, $15.75

$14.32

$13.56

$12.06

$11.60

2 points

QUESTION 3

Find the median of the following set of data.
$12.50, $13.23, $11.20, $14.50, $12.50, $13.23, $15.60, $15.75

$11.20

$15.60

$12.50

$13.23

2 points

QUESTION 4

Which measures of central tendency are the most representative of the data set?
23, 50, 49, 48, 49, 32, 37, 40, 41, 42, 41, 41, 43

mean, mode and median

mean, mode

range, median

mean, median

2 points

QUESTION 5

What is the variance of the following data? If necessary, round your answer to two decimal places.
6, 7, 10, 11, 11, 13, 16, 18, 25

31.11

32.56

33.89

34.90

2 points

QUESTION 6

What is the variance of the following data? If necessary, round your answer to two decimal places.
13, 11, 4, 5, 6, 9, 10, 12, 15, 16

16.34

17.15

15.29

14.36

2 points

QUESTION 7

What is the variance of the following data? If necessary, round your answer to two decimal places.
23, 50, 49, 48, 49, 32, 37, 40, 41, 42, 41, 41, 43

62.83

43.52

71.35

52.64

2 points

QUESTION 8

What is the standard deviation of the following data? If necessary, round your answer to two decimal places.
6, 7, 10, 11, 11, 13, 16, 18, 25

5.48

5.58

5.68

5.78

2 points

QUESTION 9

Match the following definition to the term.
Procedure for selecting sample elements from a total set of observations.

population

sample

parameter

sampling method

2 points

QUESTION 10

What sampling method was used in the following scenario?
From 1000 students, half being boys and half being girls, 100 names were pulled out of a hat to complete a survey for the school.

Simple Random Sampling

Systematic Sampling

2 points

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Answers

QuickHelper

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Status NEW Posted 19 Sep 2017 10:09 AM My Price 15.00

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	Ticket Sales for Thursday Children Adults		Ticket Sales for Friday Children Adults		Ticket Sales for Saturday Children Adults
Regular	257	183	355	402	398	423
Matinee	135	168	242	311	376	386

	Boots Blue Gray	Flats Blue Gray	Sneakers Blue Gray
Shoes Size 10	3 5	9 10	1 4
Shoes Size 12	2 0	2 7	4 0

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

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

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

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

		45 degrees and 45 degrees
		30 degrees and 60 degrees
		27 degrees and 63 degrees
		40 degrees and 50 degrees

		9 dimes and 16 nickels
		11 dimes and 14 nickels
		13 dimes and 12 nickels
		15 dimes and 10 nickels

		x + y > 2 4x + y > -1
		x + y = 2 4x + y = -1
		x + y < 2 4x + y < -1
		x + y = 2 4x + y = -1

		2x – y > -3 x > 1
		2x – y < -3 x > 1
		2x – y > -3 x = -3
		2x – y > -3 x = 1




		Not possible


		Not possible

		True
		False

		TRUE
		FALSE

		32°, 64°, 90°
		30°, 60°, 80°
		30°, 60°, 90°
		30°, 60°, 101°

		(x + 1)2 + (y + 1)2 = 36
		(x + 1)2 – (y + 1)2 = 36
		(x – 1)2 + (y – 1)2 = 36
		(x – 1)2 – (y – 1)2 = 36

		x2 + (y – 3)2 = 1
		x2 + (y – 3)2 = 2
		x2 + (y + 3)2 = 1
		x2 + (y + 3)2 = 2

		(x – 5)2 + (y – 5)2 = 42.25
		(x + 5)2 + (y + 5)2 = 169
		(x + 5)2 + (y + 5)2 = 13
		(x + 5)2 + (y + 5)2 = 42.25

		(x + 2)2 + (y + 5)2 = 6.5
		(x – 2)2 + (y – 5)2 = 42.25
		(x – 2)2 + (y – 5)2 = 6.5
		(x + 2)2 + (y + 5)2 = 42.25