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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 58127: Can someone help me on this problem?
I need to solve the following systems by substitution:
4x - 12y = 5
-x + 3y = -1
Thanks,
Lyn
Click here to see answer by ankor@dixie-net.com(22740)

Question 57957: Solve each system in three variables form
x+2y-z=5
-3x-2y-3z=11
4x+4y+5z=-18
Click here to see answer by ankor@dixie-net.com(22740)

Question 58323: I am working on systems of linear equations, which I have until now been able to complete by using substitution or elimination methods. Now, however, my homework requires me to solve systems with more than two equations. This problem has three equations, each representing a side of a triangle, and is asking for the three coordinates for the vertices.
I founnd the points at which the first line intersects with the other two (seperately), but do not know how to determine the third vertex.
HERE ARE THE EQUATIONS:
x-y=7
3x-11y=-1
x+y+1=0
AND HERE IS MY WORK THUS FAR:
x-y=7
x=7+y

3(7+y)-11y=-1
21+3y-11y=-1
21-8y=-1
-8y=-22
y=2.75
3x-11(2.75)=-1
3x-30.25=-1
3x=29.25
x=9.75
the point for this vertex is (9.75, 2.75)

7+y+y+1=0
8+2y=0
2y=-8
y=-4
x+-4+1=0
x-3=0
x=3
the point for this vertex is (3,-4)
**so i was able to find these two vertices by substitution method, but do not know how to determine the third one. If any tutor could work on this and send me a solution ASAP, so that I am able to complete the rest of the problems, I would greatly appreciate it!!
With much gratitude and thanks,
A STUDENT
Click here to see answer by funmath(2933)

Question 58363: solve the following equations and express the answer as an ordered pair if possible
2x-4y=8
x-2y=4
Click here to see answer by funmath(2933)

Question 58504: In a town election, the winning candidate had 220 more votes than the loser. If 810 votes were cast in all, how many votes did each candidate receive?
Click here to see answer by faceoff57(108)

Question 58502: A washer-dryer combination costs $1200. If the washer costs $220 more than the dryer, what does each appliance cost separately?
Click here to see answer by faceoff57(108)

Question 58525: solve the following system of linear equations and if possible express your answer as an ordered pair

y=2x+1
x+y=4
Click here to see answer by funmath(2933)

Question 58667: Could someone help me on this problem?
I need to solve the follwing systems by substitution:
8x -4y = 16
y = 2x -4
Thanks,
Sher
Click here to see answer by Cintchr(481)

Question 58529: hi, i need some help solving this equation and if possible expressing my answer as an ordered pair
x-5/3y=7
4/7x+y= -13/7
Click here to see answer by funmath(2933)

Question 58851: Could someone be so kind in helping me with this problem?
I need to solve the following systems by substitution:
8x - 4y = 16
y = 2x - 4
Thank you so much,
Ashley
Click here to see answer by funmath(2933)

Question 58854: Could someone be so kind in helping me with this problem?
I need to solve the following systems by substitution:
4x - 12y = 5
-x + 3y = -1
Thanks so much,
Ashley
Click here to see answer by funmath(2933)

Question 58928: What is the slope-intercept if the line with y intercept 2 and perpendicular to 3x + 2y=6?
Click here to see answer by uma(370)

Question 58913: Solve:
4x^2+1=2x
Click here to see answer by aaaaaaaa(138)

Question 58913: Solve:
4x^2+1=2x
Click here to see answer by checkley71(8403)

Question 59066: Solve each of the following systems by substitution.
5x - 2y=-5
y - 5x = 3
Click here to see answer by funmath(2933)

Question 59064: Solve each of the following systems by addition. If a unique solution does not exist, state
whether the system is inconsistent or dependent.
2x+3y=1
5x+3y=16
and
x+5y=10
-2x-10y= -20
thank you
Click here to see answer by funmath(2933)

Question 59063: Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x + 7y = b
mx + y = 22
Thank you
Click here to see answer by funmath(2933)

Question 59266: i dont understand how to do this problem:
y=3x-7
y=-x+1
Click here to see answer by funmath(2933)

Question 59323: what is 2x-3y=12
x=4y+1
substituion form
Click here to see answer by checkley71(8403)

Question 59323: what is 2x-3y=12
x=4y+1
substituion form
Click here to see answer by funmath(2933)

Question 59325: y= -4/3+4
Click here to see answer by checkley71(8403)

Question 59356: Is(5,-2) a solution of the system?
2x+6y=-2
2x+y=6
Click here to see answer by funmath(2933)

Question 59360: Data from 1988 through 2000 showing the percentage of Americans for and against the death penalty for a person convicted of a murder. The data can be modeled by the following system of equations:
13x + 12y = 992 The percent, y, in favor of the death penalty x is the years after 1988
-x + y = 16 The percent, y, against the death penalty x years after 1988
That is the information given here is the question:
Use the substitution method to determine in which year the percentage of American in favor of the death penalty will be the same as the percentage of Americans who oppose it. For that year, what percent will be for the death penalty and what percent will be against it?
This is written exactly like it is in the book.
Thanks
Click here to see answer by funmath(2933)

Question 59412: Please help with the following problem?
Question: solve the system of equations algebraically?
#12. -5x+2y = 8
y = -3x+26
Click here to see answer by uma(370)

Question 59507: Can someone help me on this problem?
I need t solve the system by addition:
x + y = 6
x - y = 4
Thank you,
Lisa
Click here to see answer by stanbon(75887)

Question 59501: Can someone help me solve the system by graphing it for me?
I have to send it through the computer.
x - 2y = 8
x + y = -1
Thank you so much,
Lyn
Click here to see answer by funmath(2933)

Question 59520: I need some help on this problem:
I need to solve the system by substitution
x + y = 12
y = 2x
Jamie
Click here to see answer by funmath(2933)

Question 59512: Can someone help me here?
I need to solve the system by addition:
2x + 4y = 3
4x - 2y = 1
Thank you so much,
Lisa
Click here to see answer by pvaka(23)

Question 59510: Can someone help me on this?
I need to solve the system by addition:
-4x - 7y = -11
x - 2y = -1
Thank you so much!
Lisa
Click here to see answer by pvaka(23)

Question 59569: Would someone be able to help me on this problem?
Given f(x) = -2x - 4, find f(-3)
Thanks so much,
Ashley
Click here to see answer by Edwin McCravy(20056)

Question 59567: Could someone help me on this problem?
I need to rewrite the equation 4x- 10y = 11 as a function of x.
Thank you,
Sher
Click here to see answer by venugopalramana(3286)

Question 59566: Can someone help me with this problem? I put it through last night but I forgot to put in the Y.
I need to rewrite the equation 2x - 3y = -6 as a function of x
Thanks so much,
Sher
Click here to see answer by venugopalramana(3286)

Question 59500: Can someone help me solve the system by graphing it for me?
I have to send it through the computer.
x - 2y = 8
x + y = -1
Thank you so much,
Lyn
Click here to see answer by funmath(2933)

Question 59615: THIS IS FOR SUBSTITUTION EQUATION. ITS
X+3Y=-4
Y+X=0
Click here to see answer by funmath(2933)

Question 59625: Does anybody know how to do this problem?
I need to rewrite the equation 4x - 10y = 11 as a function of x
Thanks,
Jamie
Click here to see answer by funmath(2933)

Question 59624: I need some help on this problem:
I need to rewrite the equation 2x - 3y = -6 as a function of x
is it:
(A) f(x) = 2/3 x + 2
(B) f(x) = 3/2 x -3
(C) f(x) = 3/2 x -6
(D) f(x) = 2/3 x + 6
Thanks,
Jamie
Click here to see answer by funmath(2933)

Question 59486: how uo u graph y=6-x
y=x+4
and describe it as consistend and independent, consistent and dependent, or inconsistent
Click here to see answer by funmath(2933)

Question 59724: Solve for ( x, y)
6x - 2y = 16
y = 2x - 4
Click here to see answer by stanbon(75887)

Question 59720: Solve the system: x - 5y = -9
x = y - 1
One of the solutions is :
a) x = 1
b) x = -1
c) y = -2
d) y = 2
e) none of the above

Click here to see answer by funmath(2933)

Question 59713: When graphing the fallowing system the two lines __________________.
x+y=4
x+y=-4
a) are Parallel
b) intersect at one point
c) are the same
d) intersect at two points
e) none of the above
Click here to see answer by funmath(2933)

Question 59765: I tried using your solver for this problem but couldn't imput it correctly can you please help
Use substitution to solve
x = 3y - 2
2x + 4y =16

Click here to see answer by Cintchr(481)

Question 59764: Please help me solve the following :
Determine whether the system has one solution, no solution or infinitely many solutions
y = 2/3x
2x - y = -4
Click here to see answer by Cintchr(481)

Question 59767: I tried using one of your solvers for the following problem and it gave me an error and said solution not found so if you could help that would be great!
Find the solution of the system
y = x^2 + 5
and
y = 2x + 4
Click here to see answer by Cintchr(481)

Question 59763: I need help to solve please
The directions state to determine whether the system has one slutions, no solution or infinitely many solutions may you please help
y = -x + 2
3x + 3y = 6

Click here to see answer by funmath(2933)

Question 59815: Please help me :(
6(x+2)+4x=5x-23
Thank you.
Click here to see answer by uma(370)

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