57 264
Assignments Done
Successfully Done
In February 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Linear Algebra Question for Omoregbe Frank

Question #8792
Solve the set of linear equations by the matrix method: a+3b+2c=3, 2a-b-3c= -8, 5a+2b+c=9. Solve for c.

(A) 3
(B) 1
(C) 5
(D) 7
Expert's answer

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


Assignment Expert
24.10.2013 12:31

2x+4y=10 (1)
3x+6y=15 (2)

Dividing the first one by two we obtain x+2y=5 whence x=5-2y
Now we substitute this expression into (2):
Opening the braces we obtain:
15-6y+6y=15 which gives us 15=15 - right equality
Basicaly, such outcome means that our two equations are not independent. We can clearly see that if we divide (2) by 3: we obtain x+2y=5 which is teh same as (1) divided by 2. Actually, we have one distinct equation. Such system is called indefinite. We cannot uniquely calculate the solution. Instead such system has infinit number of solutions for which the equality x=5-2y holds.

02.10.2013 05:27

Solve the linear equations 2x+4y=10 and 3x+6y=15

Leave a comment

Ask Your question