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Tutors Answer Your Questions about Matrices-and-determiminant (FREE)
Question 94554: Matrices-and-determiminant/94544 (2007-08-26 21:09:08): I promise this is the last time I will beg for your help PLEASE HELP =I will pay you thru pay pal if I can get this answered in the next 1/2 hr. I am willing to pay PLEASE I AM DESPERate
Solve the system of equations by the Gaussian elimination method:
1. Solve the system of equations by the Gaussian elimination method:
2x+y-3z=1
3x-y+4z=6
x+2y-z=9
2. Solve the system of equations by the Gaussian elimination method:
x-y+z=17
x+y-z=-11
x-y-z=9
Again thank you in advance for your help.
0 solutions
Click here to see answer by chitra(359)  |
Question 94544: I promise this is the last tie I will beg for your helpPLEASE HELP =I will pay you thru pay pal if I can get this answered in the next 1/2 hr. I am willing to pay PLEASE I AM DESPERATE
Solve the system of equations by the Gaussian elimination method:
1. Solve the system of equations by the Gaussian elimination method:
2x+y-3z=1
3x-y+4z=6
x+2y-z=9
2. Solve the system of equations by the Gaussian elimination method:
x-y+z=17
x+y-z=-11
x-y-z=9
Again thank you in advance for your help.
0 solutions
Click here to see answer by chitra(359) |
Question 100491: heres my question Is solving systems by substitution, elimination or cramers rule which is easiest my teacher said we can use any of the three on an up coming test to solve only for 2 variables i'm not real proficient at any yet. and I want to focus on one skill / formula / to get thru this exam which one can you explain briefly (he can't) I'm frustrated because 1.) he dosent teach it out of the book and goes to quicklyin class to learn. Can you help me with a simple format I can understand THANK YOU jackie
Click here to see answer by stanbon(57984) |
Question 100470: During the 2003-2004 NBA season, Dirk Nowitzki of the Dallas Mavericks made a total of 976 shots and scored 1680 points. His shots consisted of 3-point field goals than free throws. Use an inverse matrix to find how many of each type of shot he made.
Click here to see answer by stanbon(57984) |
Question 101340: Could you please take the time to help me solve this question: Suppose A is a 2 x 3 matrix, where its first row consists of 1, 2, and 0, and its second row consists of 0, 2, and 1. Find the transpose of A, i.e., AT, then multiply A by its transpose, i.e., A AT and finally find the inverse matrix of their product.
Thank you, very much for taking the time to help me, most appreciated
Click here to see answer by jim_thompson5910(28717) |
Question 102566: Use the elimination method to find all solutions of the system;
A. 5x+2y=-19
7x+3y=-27
x=___ y=____
b. x+3y=5
6y+z=12
x-2x=10
c. 2/x+3y=16
-1/x+2/y=6
d. y=64-x^2
y=x^2-64
The two solutions of the system are:
one with x<0 x=___ y=____
one with x>0 x=___ y=____
I have tried working the elimination rules but am confused with getting rid of x in the second equation to solve for y?
Click here to see answer by rmromero(383) |
Question 102524: This one is set up like a word problem and I could use some assistance.
A company produces both large and small cabinets. A small cabinet requires 1 hour of labor and a large cabinet requires 4 hours of labor. The company has at most 80 hours of labor available each day. No more then 60 small cabinets and no more than 15 large cabinets can be produced in a day due to space limitations. If the company's profit is $120 per small cabinet and $250 per large cabinet, how many of each should be produced to maximize profit? What is the maximum profit?
Click here to see answer by ankor@dixie-net.com(15747)  |
Question 95450: Prove that the set of all 3 x 3 matrices with real entries of the form
[ 1 a b
0 1 c
0 0 1]
is a group.
(Multiplication is defined by [ 1 a b
0 1 c
0 0 1] x
[1 a' b'
0 1 c'
0 0 1]
[ 1 (a+a') (b'+ac'+b
0 1 c'+c
= 0 0 1 ]
this group, sometimes called the Heisenberg group after the Nobel Prize winning physcicist Werner Heisenberg, is intimately related to the Heisenberg Uncertainty Principle of quantum physics. )
PLEASE HELP DUE TODAY
Click here to see answer by rahul(6) |
Question 105797: This is a word problem and we have been using cramer's rule, but I don't know how to set it up. Rosa rides the bus to work. Usually she rides 35 min and then walks 6 min to get to work. Since the bus travels at 30 miles per hour and her walking speed is 5 mph, she can easily determine that the total distance is 18 miles. One day when the weather was nice, she decides to get off the bus earlier and walk the rest of the way for exercise. She only has a total of 75 min to get to work, so she can't afford to get off the bus too early. How much time should she spend on the bus before getting off to walk? The answer is 28.2 min. I have been out of school due to medical reasons for over a month and I am trying to teach myself the math before I go back. If you can help me to figure out how to set this up I would really appreciate it.
Click here to see answer by stanbon(57984) |
Question 106518: The questions is
Find a basis for the span of the given vectors.
[1, -1, 0], [-1, 0, 1], [0, 1, -1].
For some reason I reduced it and got
[1 0 0], [0 1 0], [-1 -1 0]
but i am not sure where/how to go from here and the book that we have does't give an example of how to do this. Was I even supposed to reduce it?
Click here to see answer by jim_thompson5910(28717) |
Question 106542: Find a basis for the span of the given vectors
[1 -1 0], [-1 0 1], [0 1 -1]
I reduced it and got stuck after that. I am supposted to use the properties (zero martrix and such) or something else? I am just stuck and have no clue as to what I am looking for. Our text is custum and does not have an example of this but it does have examples of finding the basis of row space, column space, and null cpace of a matrix. Is this the same thing?
Please Help!
Thank you in advance!!!
Click here to see answer by jim_thompson5910(28717) |
Question 106547: Sorry, last question!
Prove that if the columns of A are linearly independent, then they must for a basis for col(A).
the only thing that i could think of was to take a matrix and reduce it but you can use an example to prove something (they don't give A and they don't say if it is a 2x2 or a 4x4 or anything). I have no idea where to go from here.
Thanks in advance!
Click here to see answer by jim_thompson5910(28717) |
Question 108979: 2. You are given the following system of linear equations:
3x – 2y + z = 2
-x + y = 3
-2y + 6z = -1
a. Provide a coefficient matrix corresponding to the system of linear equations.
b. What is the transpose of this matrix?
c. Find the determinant for this matrix
Click here to see answer by Fombitz(13828)  |
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