QuickHelper

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About QuickHelper

Levels Tought:
Elementary,High School,College,University,PHD

Expertise:
Accounting,Applied Sciences See all
Accounting,Applied Sciences,Business & Finance,Chemistry,Engineering,Health & Medical Hide all
Teaching Since: May 2017
Last Sign in: 352 Weeks Ago, 5 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 29 Aug 2017 My Price 15.00

I need help to answer this q in precalculus

QUESTION 1 (4 POINTS)

Question 1 Unsaved

Solve the system of equations by substitution.


Question 1 options:
A) x = 2, y = -11; (2, -11)

 

B) x = 2, y = 11; (2, 11)

 

C) x = 9, y = -11; (9, -11)

 

D) x = 9, y = 2; (9, 2)

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QUESTION 2 (4 POINTS)

Question 2 Unsaved

Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.

Question 2 options:
A) x = 2, y = -5; (2, -5)

 

B) x = -5, y = -2; (-5, -2)

 

C) x = 5, y = -2; (5, -2)

 

D) x = -2, y = 5; (-2, 5)

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QUESTION 3 (4 POINTS)

Question 3 Unsaved

Verify that the values of the variables listed are solutions of the system of equations.




x = -2, y = -3

Question 3 options:
A) solution

 

B) not a solution

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QUESTION 4 (4 POINTS)

Question 4 Unsaved

Graph the system of inequalities.

y < -x + 10
y > 9x - 3

Question 4 options:
A)

 

B)

 

C)

 

D)

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QUESTION 5 (4 POINTS)

Question 5 Unsaved

Solve the system of equations using substitution.


Question 5 options:
A) x = -4, y = 5; x = -5, y = 4
or (-4, 5), (-5, 4)

 

B) x = 4, y = -5; x = 5, y = -4
or (4, -5), (5, -4)

 

C) x = -4, y = -5; x = -5, y = -4
or (-4, -5), (-5, -4)

 

D) x = 4, y = 5; x = 5, y = 4
or (4, 5), (5, 4)

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QUESTION 6 (4 POINTS)

Question 6 Unsaved

Find the value of the determinant.

Question 6 options:
A) -4

 

B) 4

 

C) 8

 

D) 1

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QUESTION 7 (4 POINTS)

Question 7 Unsaved

Solve the system of equations. If the system has no solution, say that it is inconsistent.


Question 7 options:
A) x = , y = ; 

 

B) x = -9, y = -8; (-9, -8)

 

C) x = 9, y = 2; (9, 2)

 

D) inconsistent

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QUESTION 8 (4 POINTS)

Question 8 Unsaved

Solve the system of equations by elimination.


Question 8 options:
A) x = 3, y = 8; (3, 8)

 

B) x = 2, y = 8; (2, 8)

 

C) x = 3, y = 9; (3, 9)

 

D) x = 2, y = 9; (2, 9)

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QUESTION 9 (4 POINTS)

Question 9 Unsaved

Solve the system of equations using substitution.


Question 9 options:
A) x = 6, y = 5; x = 5, y = 6 
or (6, 5), (5, 6)

 

B) x = -6, y = -5; x = -5, y = -6
or (-6, -5), (-5, -6)

 

C) x = -6, y = 5; x = -5, y = 6
or (-6, 5), (-5, 6)

 

D) x = 6, y = -5; x = 5, y = -6
or (6, -5), (5, -6)

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QUESTION 10 (4 POINTS)

Question 10 Unsaved

Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.

Question 10 options:
A) x = 9, y = 3; (9, 3)

 

B) x = -9, y = 3; (-9, 3)

 

C) x = -3, y = -9; (-3, -9)

 

D) x = 3, y = 9; (3, 9)

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QUESTION 11 (4 POINTS)

Question 11 Unsaved

Graph the system of inequalities.

2x + y > 6
2x + y < 1

Question 11 options:
A)

 

B)

 

C) No solution

 

D)

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QUESTION 12 (4 POINTS)

Question 12 Unsaved

Verify that the values of the variables listed are solutions of the system of equations.




x = 4, y = 3

Question 12 options:
A) solution

 

B) not a solution

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QUESTION 13 (4 POINTS)

Question 13 Unsaved

Find the value of the determinant.

 

Question 13 options:
A) 64

 

B) 8

 

C) -8

 

D) 4

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QUESTION 14 (4 POINTS)

Question 14 Unsaved

Solve the system of equations by elimination.


Question 14 options:
A) x = 1, y = 0; (1, 0)

 

B) x = 0, y = 0; (0, 0)

 

C) x = 0, y = 1; (0, 1)

 

D) x = 1, y = 1; (1, 1)

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QUESTION 15 (4 POINTS)

Question 15 Unsaved

Solve the system of equations by elimination.


Question 15 options:
A) x = -18, y = 5; ( -18, 5)

 

B) x = -5, y = 18; (-5, 18)

 

C) x = 18, y = -5; (18, -5)

 

D) x = -18, y = 6; (-18, 6)

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Answers

QuickHelper
(10)
Status NEW Posted 29 Aug 2017 03:08 PM My Price 15.00

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