QuickHelper

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About QuickHelper

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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

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  • Corportae Manager
    ChevronTexaco Corporation
    Feb-2009 - Nov-2016

Category > Engineering Posted 30 Aug 2017 My Price 11.00

solving systems of equations

Estimate the solution of the system of equations shown in the graph below?

(1, 0) and (-3, 0)

(0, -3) and (0, -1)

(-1, -2)

(-2, -1)

==================================

If a system of equations has exactly one solution, it is ____________________?

consistent and independent

inconsistent and independent

inconsistent and dependent

consistent and dependent

==================================

Which of the following graphs best represents a system of equations that has no solution?

http://www.intervisualtechnology.us/data/1/15401/U4L1Q1A1.jpg

http://www.intervisualtechnology.us/data/1/15402/U4L1Q1A2.jpg

http://www.intervisualtechnology.us/data/1/15403/U4L1Q1A3.jpg

http://www.intervisualtechnology.us/data/1/15404/U4L1Q1A4.jpg

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A student uses the substitution method to solve the system of equations below algebraically.

2x - y = 5
3x + 2y = -3

Which equation could be used?

3x + 2(2x - 5) = -3

3x + 2(5 - 2x) = -3

3(y + 5/2) + 2y = -3

3(5/2 - y) + 2y = -3

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Which linear system has been correctly solved for one of the variables from the following system?

2x - y = -1
2x + y = -7

2 x space minus space y space equals space minus 1 space y space equals space 2 x space minus space 7

2 x space minus space y space equals space minus 1 space y space equals space minus 2 x space plus space 7

y space equals space 2 x space plus space 1 space 2 x space plus space y space equals space minus 7

y space equals space minus 2 x space plus space 7 space 2 x space plus space y space equals space minus 7

============================

Which linear system has the solution (6, 6)?

3 x space plus space y space equals space 4 4 x space minus space 3 y space equals space 1

4 x space plus space 3 y space equals space 0 2 x space minus space y space equals space 0

4 x space minus space 3 y space equals space minus 1 space space minus 2 x space plus space y space equals space minus 3

x space plus space y space equals space 12 space 3 x space minus space 2 y space equals space 6

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A student is using the elimination method to solve the system of equations below. What is the best first step?

3x - y = 5
2x + 3y = 10

Multiply the first equation by 2.

Multiply the second equation by 3.

Multiply the first equation by 3.

Multiply the second equation by 2.

=================================

In which line is a mistake first made when solving the following system of equations by elimination for s?

2r + 7s = 11
r - 9s = -7

Line 1 2r + 7s = 11
2(r - 9s = -7)
Line 2 2r + 7s = 11 
2r - 18s = -14
Line 3 -11s = -3
Line 4 s = 11/3

==============================

Find the solution to the system of equations.

4c = 3d + 3
c = d - 1

c = 6, d = 7

c = 3, d = 4

c = 8, d = 7

c = 5, d = 4

=======================

What is the solution to the system of equations.

2x - 3y = -9
-x + 3y = 6

(3, 3)

(-3, 1)

(-3, 3)

(1, -3)

Answers

QuickHelper
(10)
Status NEW Posted 30 Aug 2017 09:08 AM My Price 11.00

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