Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 92581: Solve –5x – 9 – 3x = –8x + 1
A) 0 B) 1 C) Identity D) No solution

Click here to see answer by uma(370)

Question 92568: the sum of two numbers is 44. One number is 12 more than the other. What are the numbers?
Click here to see answer by ankor@dixie-net.com(15622)

Question 92568: the sum of two numbers is 44. One number is 12 more than the other. What are the numbers?
Click here to see answer by tutorcecilia(2152)

Question 92620: Solve the system of equations:{3x+9y=7}
{2x+6y=1}
Click here to see answer by jim_thompson5910(28476)

Question 92625: Describe all the points in the 2nd and 3rd quadrants.

Click here to see answer by stanbon(57203)

Question 92621: Solve the system of equations: {2x+y-3z=1}
{3x-y+4z=6}
{x+2y-z=9}

Click here to see answer by jim_thompson5910(28476)

Question 92618: 1. Solve the system of equations: {y=3x-14}
{ y=5x-20 }

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Question 92622: A coin bank contains only pennies, dimes, and quarters. The value of the coins is $4.49. There are 5 more pennies than quarters. The number of dimes is 1.5 times the number of pennies. Find the number of each coin in the bank.
Click here to see answer by ankor@dixie-net.com(15622)

Question 92776: Solve the system of equations: {4x+y+5z=6}
{2x+2y-z=11}
{x+2y+2z=6}
Click here to see answer by Edwin McCravy(8879)

Question 92979: The sum of two numbers is 112. the second is 7 more than 4 times the first. What are the two numbers?
Click here to see answer by jim_thompson5910(28476)

Question 93079: A= 1/2h (a+b)find b
Click here to see answer by stanbon(57203)

Question 93165: An objective function is to be maximized given the following constraints: x + 2y <- 4, x - y <- 1, x >- 0, y >- 0. Find the vertices of the set of feasible solutions.
Thank you

Click here to see answer by mathispowerful(115)

Question 93162: Please help me!!! I am a coplete wreck with these
When the following system is solved: x + y>- 3, 2x + 3y >- 6, x > 0, and y > 0, the solutions lie in which quadrant(s)?

Click here to see answer by mathispowerful(115)

Question 93167: Solve the system of equations:
{8x-4y=12
{6x-3y=9
A. (-1, 1)
B. Dependent
C. Inconsistent
D. (1, -1)

Click here to see answer by jim_thompson5910(28476)

Question 93167: Solve the system of equations:
{8x-4y=12
{6x-3y=9
A. (-1, 1)
B. Dependent
C. Inconsistent
D. (1, -1)

Click here to see answer by scott8148(6628)

Question 93326: Solve each equation or system of equations.
y=x-3
7x-2y=21
Click here to see answer by checkley75(3666)

Question 93420: Solve the system of equations using the addition (elimination) method. If the answer is a unique solution present it as an ordered pair: (x, y). If not specify whether the answer is "no solution" or "infinitely many solutions. Can you show me how to work this problem so I can do my homwwork?
4x + y =4
2x + 8y =0
Click here to see answer by jim_thompson5910(28476)

Question 93491: i have no idea how to start
X + 2y = -1
2x - y = 8
solve the system
Click here to see answer by checkley75(3666)

Question 93526: -2x+3y=14
x+2y=7
Click here to see answer by jim_thompson5910(28476)

Question 93582: Solve the system of equations. Determine the number of solutions for each.
{1/3x+y=9
{-2x+2y=-6
Click here to see answer by edjones(7569)

Question 93659: I am stumped on this one.
Solve the system by addition.
-4x + 5y = 5
x - 2y = -2
Could you help guide me on the right track? Thank you.
Click here to see answer by stanbon(57203)

Question 93785: Here is the problem I received on a summer homework packet. I think there is not enough information to answer the question. Here is the question.
Two cell phone companies are promoting cell phone plans. Company A offers a flat fee of $90.00 per month. Comapny B offers a different plan. It will cost $15.00 per month for service .10 per minute. You will need to compare the two plans to decide which plan is better for you.
Sketch both equations on the same x - y plane.
How would you know which plan is better if minutes used or more information is given?
Thanks,
Matt
Click here to see answer by ankor@dixie-net.com(15622)

Question 93996: The solution to the system of equations
x + 3y = 12
4x - y = -17 is?
Click here to see answer by scott8148(6628)

Question 93995: The equation of the line through (8,6) and (2,-4) is?
Click here to see answer by checkley75(3666)

Question 93958: I have tried to solve this equation by a couple of methods and I can't seem to get it right. If you could show the process it would help.
A (greater than or = here) 0.25 (A+B)
I couldn't get the symbol to work
Click here to see answer by ankor@dixie-net.com(15622)

Question 94222: I need help solving these constraints
3A-2B>=0
2A-1B<=200
Click here to see answer by ankor@dixie-net.com(15622)

Question 94297: 7x - 3y + 2z = 0
4x - 4y - z = 2
5x + 2y + 3z = 1
Click here to see answer by stanbon(57203)

Question 94383: I am trying to solve these equations by substitution or elimination amd then I have to interpret the result. Each time I do it, my solution comes out to 0. Can someone help me understand this?
2x+4y=10
3x+6y=12
Click here to see answer by jim_thompson5910(28476)

Question 94411: This is causing stress and can not figure it out?

Solve the system by addition or substitution.
20x – 5y = –12
y = 4x + 3

Click here to see answer by jim_thompson5910(28476)

Question 94410: Can not figure this one out?

Solve the system by addition or substitution.
3x – 4y = 8
6x – 2y = 10

Click here to see answer by jim_thompson5910(28476)

Question 94539: How can I solve this by elimination method?
x-y=8
6+3y=-2x
And can I solve this in substitution method and get the answer x=18/5 and y=10/5
Click here to see answer by stanbon(57203)

Question 94628: I have another word problem that I need help with.
A professor started a project with a group of students, 60% of whom were boys. Due to some unavoidable reasons, six girls couldn't turn up, so the professor had to make some changes in the group. He admitted six boys. In doing so, the percentage of boys in the project increased to 75%. Find the number of boys and girls involved in the project initially.

Click here to see answer by stanbon(57203)

Question 94475: Solve the system of equations. Check your solution.

-x+y-3z= -4
3x-2y+8z= 14
2x-6y+5z= -3
Click here to see answer by ankor@dixie-net.com(15622)

Question 94777: A professor started a project with a group of students, 60% of whom were boys. Due to some unavoidable reasons, six girls couldn't turn up, so the professor had to make some changes in the group. He admitted six boys. In doing so, the percentage of boys in the project increased to 75%. Find the number of boys and girls involved in the project initially.
Click here to see answer by ptaylor(2048)

Question 94867: 1/3x + 6/5 = 5x - 2/5
Click here to see answer by checkley71(8403)

Question 95007: Solve the following systems. Write answers as an ordered pair.
y-x =5
x+y = -1
Click here to see answer by kiljoy(51)

Question 95143: 2x^4(2x^5)^3
Click here to see answer by checkley71(8403)

Question 95141: 8x-10=2x
Click here to see answer by checkley71(8403)

Question 95142: 5/6x+1/3= 3/4x-1/2
Click here to see answer by ankor@dixie-net.com(15622)

Question 95432: I was wondering how you solvea system of euqations problem. The problem is 8x+3y=26
2x=y-4
Thanks fo much for you help = )
Click here to see answer by kiljoy(51)

Question 95432: I was wondering how you solvea system of euqations problem. The problem is 8x+3y=26
2x=y-4
Thanks fo much for you help = )
Click here to see answer by edjones(7569)

Question 95440: I am having a tough time solving
19=5x+2y
1=3x-4y
Thank you so much for helping me with my homework!
Click here to see answer by kiljoy(51)

Question 95438: Can you please help me solve
5x-4y=20
3x+y=12
Thanks so much for the help!!! = )

Click here to see answer by kiljoy(51)

Question 95546: write the point slope of a line that passes through (0,5) and (5,1)
Click here to see answer by checkley71(8403)

Question 95580: y=2x-1
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