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

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Question 170689: Larry can paint a room in 8 hours by himself. After he worked for 2 hours, Patrick joins him and they finish the job in 2 hours. How long would it take Patrick to do the entire job without Larry?
Click here to see answer by stanbon(75887)

Question 170710: If x=3 and x= -5, then form a quadratic equation
Click here to see answer by jojo14344(1513)

Question 170730: I'm 60 years old and I decided to go back to show and this math is a little hard please please help.
Plot the graph of the equations 4x - 6y = 2 and 2x - 3y = 1 and interpret the result.

thank you in advance.

Click here to see answer by jim_thompson5910(35256)

Question 170811: y=x-5
What is the x and y intercepts
Click here to see answer by Alan3354(69443)

Question 170858: Write a Linear equation that gives total fees (t) to be paid by astudent taking (x) credits.
$20 per credit.
$50 student service fee.
Click here to see answer by Mathtut(3670)

Question 170857: Write a Linear equation that gives total fees (t) to be paid by astudent taking (x) credits.
$20 per credit.
$50 student service fee.
Click here to see answer by Mathtut(3670)

Question 170972: f(x)=x-3/x+4 the x-3 is over the x+4 What would the y and x intercepts be?
Click here to see answer by Mathtut(3670)

Question 171140: I do not understand fraction problems. Please help me with this one so I have a correct model to refer to for the rest of my worksheet. Thank you. (7x/8)- (4)= x
Click here to see answer by jojo14344(1513)

Question 171134: How do I solve: x=-2/7y+3/4? How do i find the y-intercept and x-intercept and graph y= 2x+4 / y= -2x-4?
Click here to see answer by jojo14344(1513)

Question 171244: solve by graphing
x=-1
4x+y=-2
Click here to see answer by stanbon(75887)

Question 171244: solve by graphing
x=-1
4x+y=-2
Click here to see answer by Mathtut(3670)

Question 171281: whats the steps to solving systems of equations by using elimination
Click here to see answer by solver91311(24713)

Question 171281: whats the steps to solving systems of equations by using elimination
Click here to see answer by midwood_trail(310)

Question 171363: I apologize if this is in the wrong heading. My problem is systems of linear equation by substitution. { y=4x { y=2x+6
I am not sure how to do this problem. I tried getting the numbers to match up so i could figure it out, but i cant seem to grasp it. Sorry if you cannot solve this problem and i'm sorry for wasting your time, but i am about ready to give up. This is a worksheet, and not from a book, by the way.

Click here to see answer by Alan3354(69443)

Question 171527: Given y=1/2x-1, which of the following tables of value are correct?
Table A
x,y
2,0
0,-1
-2,-2
Table B
x,y
5,2
2,0
-5,-2
Table C
x,y
6,3
7,2
-8,-3
Table D
x,y
1,1
-1/2, -1/2
-1,-1

Click here to see answer by KnightOwlTutor(293)

Question 170304: Solve the system of linear equations. Determine whether the system is consistent or inconsistent.
2x + 8y + 3z= -4
-4x - 16y - 6z = 8
3x + 4y - 3z = 2
Click here to see answer by Alan3354(69443)

Question 171749: 3x - y = 0
5y = 15
Click here to see answer by Alan3354(69443)

Question 171748: 3x - y = 10
x - 3y = 11
Click here to see answer by Alan3354(69443)

Question 171805: How to write an equation in standard form using integers
Click here to see answer by jim_thompson5910(35256)

Question 172348: 1 times a number plus -5 that will give me an answer of -3
Click here to see answer by Mathtut(3670)

Question 172386: solve for x
2^(x+4)=8
Click here to see answer by user_dude2008(1862)

Question 172383: solve for x
2^(x=4)=8
Click here to see answer by Alan3354(69443)

Question 172445: I need help solving a substitution problom
-3x+y=-3
2x-5y=-11
Click here to see answer by jim_thompson5910(35256)

Question 172444: I need help solving a substitution problom
-3x+y=-3
2x-5y=-11
Click here to see answer by checkley77(12844)

Question 172451: I need help solving a substitution problom
1/2x+y=2
2x+3y=9
Click here to see answer by stanbon(75887)

Question 172451: I need help solving a substitution problom
1/2x+y=2
2x+3y=9
Click here to see answer by Alan3354(69443)

Question 172452: i need help soving a substitution problom
2x-3y=-14
3x-y=-7
Click here to see answer by Alan3354(69443)

Question 172455: may you please hlep me solve this substitution problom
2x+5y=4
x+5y=7
Click here to see answer by Mathtut(3670)

Question 172601: Find the standard form of the line that is perpendicular to y=3/5x+9 and contains (-5,-1) I have worked this several times and my mom has too but we are not getting one of the answers provided
answers are:
a)5x-y=5
b)5x-3y=28
c)3x+5y=5
d)5x+3y=-28
PS. this is a worksheet provided by accelerated math and not directly out of the book
Click here to see answer by Alan3354(69443)

Question 172785: Given the system of equations

Solve the system of equations using the substitution method.
Click here to see answer by jim_thompson5910(35256)

Question 172786: Given the system of equations

Solve the system of equations by graphing.
Click here to see answer by jim_thompson5910(35256)

Question 172787: Solve

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Question 172805: How do i slove the system 2x-5y=9 and -3x+y=-7 using the substitution method?
Click here to see answer by colliefan(242)

Question 172814: solve by graphing
x-y=1
x+y=-1
Click here to see answer by jim_thompson5910(35256)

Question 172813: solve by graphing
x-y=1
x+y=-1
Click here to see answer by jim_thompson5910(35256)

Question 172830: solve:
A) x=-2y
3x-2y=8
B) 2x-3y=13
3x+y=3
C) 2s-t=4
3s-5t=2
D) x/3-y/6=-1/3
x+y=-3-2x-y
Click here to see answer by midwood_trail(310)

Question 172963: Here's my problem I need some help!!! When you use y-y=m(x-x). I can do everything except for the final answer. Example: m=7/8,(2,-7)
I can set up the problem
y-(-7)=7/8(x-2)
y-(-7)=7/8x-7/4
This final step is where I have trouble and can't seem to understand.
They say to add -7 to 7/4, but how would you get an answer of 35/4?
Click here to see answer by gonzo(654)

Question 173080: x=y+3 3x-2y=4. I did get to work this problem out and hopefully it is right but I do not know if it is independent, dependent or inconsistent. I solved by substitution and think it is I thought it was onconsistent but somebody told me I was incorrect. Can you explain the difference and what it is? Tyvm, Judy
Click here to see answer by jim_thompson5910(35256)

Question 173076: I have tried working on this problem for two days so I am giving in to ask for help. Math is NOT my strongest, but my weakest. 2x=2-y 3x+y=-1 I need to solve this by the adiition method. I am a student at UOP and do not use a book. I have to use ALEKS which I don't like! Any help would be most appreciated. Thank you in advance, Judy
Click here to see answer by jim_thompson5910(35256)

Question 173092: Solve the following systems of equations using Cramer's rule:
2x+y=11, x+3y=18.
This is what I came up with:
D=7, Dx=51, Dy=47
with the solution being [7.29, 6.71]
Not sure if this is correct, just need a little help.

Click here to see answer by nerdybill(7384)

Question 173156: I need to solve tis by graphing and have done this ten times and still can not find the points to graph.
3x-2y=6
3x+2y=6
Could somebody please help me figure out how to graph this? Thank you in advance. Judy
Click here to see answer by jim_thompson5910(35256)

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