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

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Question 125034: solve the following by graphing
2x-y=4
2x-y=6
Click here to see answer by Fombitz(13828)

Question 124765: Find the slope of the line whose equation is 8x+7y=56?
Click here to see answer by ankor@dixie-net.com(15652)

Question 125088:

4x-2y=42 5x+3y=25
Click here to see answer by checkley71(8403)

Question 125135: how do you show the linear graph for y<6 and y>3
Click here to see answer by ilana(307)

Question 125135: how do you show the linear graph for y<6 and y>3
Click here to see answer by MathLover1(6634)

Question 125139: 1. Given f(x) = 4-x-x^2. Find f(3)
2. Find the domain of the function F given by F(x)=x+4/x
3. Solve by substitution: x=4y + 3; 2x + 5y = 6
4. Solve the system of equations: 2x - y =5 and x + 2y = 10. Put the answer in the form of (x,y).
5. Solve the system of equations: y=x+7; 2x +3y = 6. Put the answer in the form of (x,y).
6. Solve the system of equations: 4x - 3y =15; 3x + 5y =4. Put the answer in the form of (x,y).

Click here to see answer by solver91311(16885)

Question 125296: given f(x)=4x-5, find f(1)
Click here to see answer by checkley71(8403)

Question 125295:
write the equation of the line passing through (-3 ,-5) and (3,0)
Click here to see answer by checkley71(8403)

Question 125294: which two equations represent parallel lines
y=2/3x+2
y=- 3/2x -5
y=9x+7
y=9x-2

Click here to see answer by checkley71(8403)

Question 125294: which two equations represent parallel lines
y=2/3x+2
y=- 3/2x -5
y=9x+7
y=9x-2

Click here to see answer by mathobsess(2)

Question 125339: This is from MYMATHLAB Book from school
Find an equation of the line containing the given pair of points. Express your answer in the form x=a, y=b, or y=mx+ b
(-5, -5) and (5,5)
What is an equation of the line?
y=
Simplify your answer
Click here to see answer by stanbon(57352)

Question 125506: Rewrite the equation 4x-6y=-30 as a function of x
Click here to see answer by solver91311(16885)

Question 125670: Write an equation of the line that passes through the point and has the given slope. Write the equation in slope-intercept form (y= mx + b)
(3,4), m = 1/2

Click here to see answer by SoOoDumb(14)

Question 125685: Solve the system by addition
-5x+2y=10
x-3y=11
Click here to see answer by jim_thompson5910(28595)

Question 125686: Solve the system by substitution
2x+2y=0
y=4x+0
Click here to see answer by jim_thompson5910(28595)

Question 125707: One number is 12 more than another. The sum of the smaller number and twice the larger number is 36. Find the larger number
Click here to see answer by solver91311(16885)

Question 125707: One number is 12 more than another. The sum of the smaller number and twice the larger number is 36. Find the larger number
Click here to see answer by MathLover1(6634)

Question 125705: The sum of two numbers is 33. Their difference is 9. What are the two numbers?
Click here to see answer by solver91311(16885)

Question 125705: The sum of two numbers is 33. Their difference is 9. What are the two numbers?
Click here to see answer by MathLover1(6634)

Question 125748: 7x+2y=9
3x+8y=11

Click here to see answer by jim_thompson5910(28595)

Question 125798: Given f(x)= 5x^2-3x+1, find f(-2)
Click here to see answer by bucky(2189)

Question 125797:
The difference of two numbers is 91. THe second is 5 less than 5 times the first. What are the two numbers?
Click here to see answer by Earlsdon(6287)

Question 125797:
The difference of two numbers is 91. THe second is 5 less than 5 times the first. What are the two numbers?
Click here to see answer by checkley71(8403)

Question 125832: This is my son'd hoework assignment, in the back of the book on page 803 in the extra practice section he has to solve proble # 18using linear combinations to solve linear equations. The problem is:
3x+7y=-1
7y=-6x
If I rearrange the equation to solve it looks like this:
3x+7y=-1
-6x-7y=?
Now what do we do?
Click here to see answer by checkley71(8403)

Question 125948: Write an equation in standard form of the line that passes through (7,-3) and has a y-intercept of 2.
Click here to see answer by josmiceli(9680)

Question 125976: I am hoping you can help me with this one, I think I got the right answer, but my grade is falling rapidly and I need to check to see if it is right so that I don't make silly mistakes that cost me.
The question is from a worksheet:
Solve the system by substitution
2x+2y=0
y=4x +0
I came up with y=4x
Is this even close. I am paranoid now about the answers I get so I just want to make sure I am doing them right. Thanks so much.
Click here to see answer by jim_thompson5910(28595)

Question 125969: What is the slope intercept form of the problem 2=3x-y?
Click here to see answer by jim_thompson5910(28595)

Question 125968: what is the slope intercept form of x-4=-y?
Click here to see answer by jim_thompson5910(28595)

Question 125966: What is the slope intercept form of 7x+7y=14?
Click here to see answer by jim_thompson5910(28595)

Question 125964: What is the x intercept and y intercept of the problem x-y=12?
Click here to see answer by jim_thompson5910(28595)

Question 125984: 3x-2<13=
-
Click here to see answer by jim_thompson5910(28595)

Question 125998: I have to determine the number of solutions and identify the type of system, as well as checking my work. I am not sure how to check my work. Can someone help me?
-6x+2y=4
3x-y=-4
Click here to see answer by jim_thompson5910(28595)

Question 126086: Using the graphing method how many solutions does this system have. 6x-2y=4
12x-6y=8
Click here to see answer by jim_thompson5910(28595)

Question 126515: I hope this is posted in the correct place. I need some help I do not understand how to do this. Thanks for any help you can give.
solve by elimination process.
0.3x -0.2y = 4
0.5x + 0.3y = 5
What is the solution of the system. It asks for an ordered pair. Thanks so much.
Click here to see answer by stanbon(57352)

Question 126654: 2x+3y=1
5x+3y=16 Solve, state if inconsistent or dependent
3y=2x+1
divide both sides by 3y=
y=2x+1/3
y=2x/3+1/3
confused on the LCM...6?
I believe once I reduce the top I then add the y into the bottom equation of
5x+(3)( y )x+(3)(y)=16
I can not go any further because I am confused on the LCM of the first equation
Click here to see answer by solver91311(16885)

Question 126657: 8x-4y=16
y=2x-4
Solve by substition
4y=8x-16
divide both sides by 4y
y=8x-16/4
y=8x/4+16/4
y=4x/2+16/4
reduce
y=2x+4
Upon plugging top equation of y into bottom equation, I became confused I came up with
y=2x-4 and y=2x+4
I must have done something wrong along the line

Click here to see answer by bucky(2189)

Question 126659: Solve the linear equation, give its solution set, and state whether the equation is conditional, identity, or inconsistent.
1/2(p+5)-4 = 1/3(2p-1)
Click here to see answer by jim_thompson5910(28595)

Question 126656: 8x-4y=16
y=2x-4
Solve by substition
4y=8x-16
divide both sides by 4y
y=8x-16/4
y=8x/4+16/4
y=4x/2+16/4
reduce
y=2x+4
Upon plugging top equation of y into bottom equation, I became confused I came up with
y=2x-4 and y=2x+4
I must have done something wrong along the line

Click here to see answer by jim_thompson5910(28595)

Question 126655: x+5y=10
-2x-10y=-20
5y=x+10
divide by 5, each side
y=x+10/5
y=x/5+10/5
Problem with LCM
I then plug y into next equation
-2x-10(y equation)+ -10 (y equation)=-20
Need help to make sense out of LCM to finish problem
Click here to see answer by jim_thompson5910(28595)

Question 126651: Find values of m and b so that the solution is (-3,4). 5x+7y=b mx+y=22
I have come up with m(-3)+4=22 -15+28=6 13=b m=6
Click here to see answer by madhan_math(34)

Question 126864: what is the correct answer to the following below:
y=2x
Click here to see answer by edjones(7569)

Question 126897: What is the correct answer to the problem see below:
x+y=12
Click here to see answer by MathLover1(6634)

Question 126905:
7x-2y=-2 3x-3y=7
Solve the following system of linear equation by elimination
Click here to see answer by checkley71(8403)

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