Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!

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Question 174752: I need help with this question:
Analyze the system
6x-2=-2y
3x+y=1
to determine whether the system has one solution, no solution, or infinitely many solutions.

Click here to see answer by Mathtut(3670)

Question 174750: I need help with this question:
What Value of m gives a system y=1^2 x-1
y=mx-1
A)one solution B) an infinitely many solution C) no solution
Click here to see answer by Mathtut(3670)

Question 172646: how do you graph linear programing?

Click here to see answer by Alan3354(69443)

Question 175018: Can you please help me with the constraints on this linear programming question?
Trenton, Michigan, a small community, is trying to establish a public transportation system of large and small vans. It can spend no more than $100,000 for both sizes of vehicles and no more than $500 per month for maintenance. The community can purchase a small van for $10,000 and maintain it for $100 a month. The large vans cost $20,000 each and can be maintained for $75 per month. Each large van carries a maximum of 15 passengers, and each small van carries a maximum of 7 passengers.
Click here to see answer by Mathtut(3670)

Question 175247: It says classify each system and give the # of solutions but i cant get it. The problem is 3x=-y-2 and 2y+4=-6x. It is solving special Systems
Click here to see answer by stanbon(75887)

Question 175356: DENNIS SAVINGS WAS 2/5 MORE THAN JULIA. AFTER DENNIS HAD GIVEN $500 TO JULIA HE HAD 1/5 OF JULIAS MONEY. FIND THEIR TOTAL SAVINGS?

Click here to see answer by gonzo(654)

Question 175452: i need help. i forgot how to do this problem.
1 is what percent of 400?

Click here to see answer by Mathtut(3670)

Question 175594: :))
Fix-It-Fast Plumbing charges $25 for a house call and $50 for each hour
spent on the job. Do-It-Right Plumbing charges $35 for a house call
and $45 for each hour spend on the job. How many hours must be spent
on the job in order for the charges of the two plumbing companies to
be equal?
Click here to see answer by Mathtut(3670)

Question 175598: 1.. Writing List the three methods used to solve systems of equations.
Choose two, and describe the strengths of those methods.

Click here to see answer by Mathtut(3670)

Question 175595: Writing In a system of three linear equations with three variables,
the number of solutions depends on how the planes defined by the
equations intersect. List the different numbers of solutions that are
possible, and explain when each occurs.
Click here to see answer by solver91311(24713)

Question 175686: How do I find the possible values of r in the inequality 5>r-3?
Click here to see answer by stanbon(75887)

Question 175697: How do I find the possible values of n in the inequality -3n<81?
Click here to see answer by jim_thompson5910(35256)

Question 175697: How do I find the possible values of n in the inequality -3n<81?
Click here to see answer by Mathtut(3670)

Question 175701: how do I solve the system of equations 3r-4s+0 and 2r+5s=23?
Click here to see answer by jim_thompson5910(35256)

Question 175701: how do I solve the system of equations 3r-4s+0 and 2r+5s=23?
Click here to see answer by Mathtut(3670)

Question 176486: what is 18r^4s^5t^6 divided by -3r^2st^3?
Click here to see answer by Mathtut(3670)

Question 176493: how do I simplify 12-(-8)*4?
Click here to see answer by stanbon(75887)

Question 176489: how do I simplify (2x+3*x-4)? 3x-4
Click here to see answer by kittyshel(1)

Question 176605: solve each system..(please) and (thanks:)
1. y=2x+8
y=3x-1
2. 2x-y=2
2x-2y=4
3. -x+y=2
2x+y=-1

Click here to see answer by stanbon(75887)

Question 176608: graph each system of constraints. find all vertices. evaluate the objective function at each vertex to find teh maximum or minimum value..:)
*** all the < and > have lines under neath them.. so all the arrows are equal or greater than...

1)x<3
y<7
x>0,y>0
maximum for p=2x+3y

2) 2x+y<30
x+y<20
x>0, y>0
minimum for c=x+4y

Click here to see answer by Fombitz(32388)

Question 176635: Solve the following systems using inverse matrices. can you also show me the steps.. thanks

2x - y = 2
2x - 2y = 4

2x + 3y + 4z = 3
-13x + 5y - 2z = 3
-3x + 4y + 3z = 6

Click here to see answer by Mathtut(3670)

Question 176633: Which point gives the minimum value for P = 3x + 2y and lies within
the system of restrictions?

( < all of them are equal or greater than but i just dont kno how to do that on here)
1 < x < 6
2 < y < 5
x + y < 10

A. (1, 2) B. (0, 0) C. (5, 5) D. (1, 5)
Click here to see answer by Fombitz(32388)

Question 176832: Which point gives the minimum value for P = 3x + 2y and lies within
the system of restrictions?

A. (1, 2) B. (0, 0) C. (5, 5) D. (1, 5)
1 < x < 6
2 < y < 5
x + y < 10
Click here to see answer by solver91311(24713)

Question 177027: (x/4)/2-(1/4)=(6x-1)/20 The answer I keep getting is 28 but when I put 28 in to check the problem it doesn't equal. Thanks for the help.
Click here to see answer by stanbon(75887)

Question 177520: the answer to the substition method of 2x+3y=5
x=4=2y
Click here to see answer by Alan3354(69443)

Question 177683: List ALL of the following ordered pairs (points) that are solutions of the equation 5X-2Y=10,
(0,5) (1,-2.5) (2,8) (3,2.5)

Click here to see answer by solver91311(24713)

Question 177734: solve the equation for the indicated variable.
a-2[b-3(c-x)]=6; for x
Click here to see answer by Mathtut(3670)

Question 177850: Find the additive inverse of each number. (please)

15. -2 - 3i
16. 1 + 4i
17. 5 - 3i
18. -7 + 2i
Click here to see answer by Mathtut(3670)

Question 177855: Solve by completing the square. Show your work.

29. 2x2 - 6x + 1 = 0
30. -x2 - 8x + 5 = 0
31. 9x2 - 18x - 1 = 0
32. -4x2 + 8x - 3 = 0
Click here to see answer by edjones(8007)

Question 177858: Evaluate the discriminant of each equation. How many real and imaginary
solutions does each have?
37. x2 + 5x + 6 = 0
38. 3x2 - 4x + 3 = 0
39. -2x2 - 5x + 4 = 0
40. 16x2 - 8x + 1 = 0
Click here to see answer by solver91311(24713)

Question 177851: Find the absolute value of each complex number.

19. 7i
20. 12
21. -3 - 2i
22. Writing Explain how to find the absolute value of any complex number.
Click here to see answer by solver91311(24713)

Question 177856: Write each function in vertex form. Sketch the graph of the function and
label its vertex.

33. y = x2 + 4x - 7
34. y = -x2 + 4x - 1
35. y = 3x2 + 18x
36.y = 1/2x2 - 5x + 12
Click here to see answer by stanbon(75887)

Question 177852: Solve each quadratic equation.

23. x2 - 16 = 0
24. 2x2 - 3x - 11 = 0

25. x2 + 3x - 10 = 0
26. 3x2 + 48 = 0

27. x2 - 5x + 4 = 0
28. 2x2 - x + 1 = 0
Click here to see answer by stanbon(75887)

Question 177847: please grahph these
[>] means equal or greater than..
() means ablsoule value.. thanks for helping

y>x-5
3x+y[<]-2

y[<]x+2
y>(x-3)+1
Click here to see answer by stanbon(75887)

Question 177848: please Graph each point.
12. (0, 4, 0)
13. (-4, 0, 0)

14. (2, 0, 5)

15. (3, 0, -2)
16. (4, 1, -1)
17. (3, -3, 1)
Click here to see answer by Fombitz(32388)

Question 177844: Solve each system of equations. please help me with these.. thanks

5x + 4y - z = 1
2x - 2y + z = 1
-x - y + z - 2

x + y + z = 0
2x + 3y 1 2z = -1
x - y + z = 2

x + 2y = 0
4x -z = 4
5y + z = -1

Click here to see answer by MathTherapy(10552)

Question 178092: I need the work shown for this:
Find two points such that their coordinates are integers (positive AND negative numbers) and the distance between them is 10.
Click here to see answer by gonzo(654)

Question 178153: The graph of y=x is translated up 3 units and left 2 units. What is the equation of the new graph?

please graph..[] means absoulte value

y=[x-1]-3
y=[x+2]

y=3x-1
Click here to see answer by stanbon(75887)

Question 178484: Fill in the chart given this linear equation:
3x - y = -10
**Type all your work below the chart.
x y
-2 4
-1
0
1
2

Click here to see answer by Mathtut(3670)

Question 178807: Factor 16a^2 - 4b^2
Click here to see answer by Mathtut(3670)

Question 179187: 2x=5x-12

Click here to see answer by Mathtut(3670)

Question 179466: find the slope and y-intercept of the line specified by the equiation 2x+3y-9=0
Click here to see answer by jojo14344(1513)

Question 179549: Find the point-slope form of the equation of the line passing through the points (8,-7) and (-7,-5)
Click here to see answer by Alan3354(69443)

Question 179905: x2-x-2=0 how to solve that
Click here to see answer by Fombitz(32388)

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