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

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Question 70872: write equation in standard form?
y-7=4(x+4)
Click here to see answer by mathman409(67)

Question 70855: write equation in standard form?
y+9=-3(x-2)
Click here to see answer by elima(1433)

Question 70862: write equation in standard form?
y-7=4(x+4)
Click here to see answer by elima(1433)

Question 70865: write equation in standard form?
y-6=4(x+3)
Click here to see answer by elima(1433)

Question 70866: write equation in standard form?
y+5=-5(x-3)
Click here to see answer by elima(1433)

Question 71081: write the slope intercept form for an equation of the line parallel to the graph of the given equation and passing through the given point?
y=-2x+4, (6,-6)
Click here to see answer by checkley75(3666)

Question 71085: write the slope intercept form for an equation of the line perpendicular to the graph of the given equation and passing through the given point?
5y=-x+1, (2,-5)

Click here to see answer by checkley75(3666)

Question 71080: write equation in standard form
y-1=2(x+1)
Click here to see answer by checkley75(3666)

Question 71079: graph equation
y=2x+1
Click here to see answer by checkley75(3666)

Question 71064: Write the equation of the line that passes through (-2,5) and (7,10)
Click here to see answer by checkley75(3666)

Question 71066: Write the equation of the line that passes through (2,7) and is parallel to the line 2x+3y=18
Click here to see answer by checkley75(3666)

Question 71084: write the slope intercept form for an equation of the line perpendicular to the graph of the given equation and passing through the given point?
2x-7y=1, (-4,0)

Click here to see answer by checkley75(3666)

Question 71083: write the slope intercept form for an equation of the line parallel to the graph of the given equation and passing through the given point?
3x+9y=1, (3,0)
Click here to see answer by checkley75(3666)

Question 71082: write the slope intercept form for an equation of the line parallel to the graph of the given equation and passing through the given point?
3x+9y=1, (3,0)
Click here to see answer by checkley75(3666)

Question 71078: graph equation
y=1/3x
Click here to see answer by checkley75(3666)

Question 71329: 3X+7Y=-6
X-2Y=11
I AM LOOKING FOR HELP WITH SUBSTITUTION
Click here to see answer by checkley75(3666)

Question 71613: solve each system by graphing
2x=3y
y=2x+4
Click here to see answer by checkley75(3666)

Question 71680: The directions were to...
Use a system of linear equations to solve each problem.
1. Your teacher is giving you a test worth 100 points containing 40 questions. There are two-point and four-point questions on the test.How many of each type of question are on the test?
Click here to see answer by stanbon(75887)

Question 71736: Use elimination to solve:
x+3y=16
2x-y=4

How do I find what x or y is equal to?
Click here to see answer by funmath(2933)

Question 71733: Solve each system by the substitution method.
3y-x=0
2y=4x-6
Click here to see answer by funmath(2933)

Question 71683: Use the substitution method to solve the linear system.
y = x - 4
4x+y = 26
Click here to see answer by checkley75(3666)

Question 71939: 6x - 1 / 5 - 2x / 3 = 3
written as:
6x - 1 2x
------ - -- = 3
5 3
Click here to see answer by ankor@dixie-net.com(22740)

Question 71783: H E L P !!!!!! How do you solve:
A three-digit number is 198 more than the number formed by reversing the digits. The 100's digit is 3 more than the 10's digit. The sum of the digits is 16. What is the original number?
Click here to see answer by ankor@dixie-net.com(22740)

Question 72245: 6x+4y=20
4x-2y=4
solving systems of equations by using the elimination method with addition or subtraction or multiplication ...
Click here to see answer by rmromero(383)

Question 72425: hello, I need to know how to solve:
For what value(s) of C does 3x-4y=9 and 12x-16y=c have infinite solutions?
Thank you

Click here to see answer by Cintchr(481)

Question 72574: 1. You live in Pennsylvania and your grandparents live in Ohio. When you are in Pennsylvania, you drive an average rate of 55 mph. When you are in Ohio, you drive an average rate of 65 mph. The entire trip of 295 miles takes 5 hours. How long does it take to reach Pennsylvania-Ohio border? How long does it take to get from the border to your grandparents' house?
Click here to see answer by ankor@dixie-net.com(22740)

Question 72575: 2. According to a local survey performed in January, 55% of the people polled said they would reelect the town's mayor. However, the mayor's percentage of votes decreased 2% each month. The survey revealed that 30% of the pople polled would vote for the challenger. The challengers percentage of votes increased 3% each month. In what month will the percentage of pople willing to vote for the challenger equal that of the mayor? What percentage will vote for the challenger in that month?
Click here to see answer by don vito(18)

Question 72766: Hi I hope you can help.
My question is 5(2x-1)=4(4-x) I know the answer to this but I cannot figure out how you get to it. The problem I seem to be having is when do two minus signs turn to a plus. I have tried this equation in both ways and can only get the answer if the minus signs change.
Also very confusing was one of the previous questions had two minus signs and would not work unless they remained as minus signs.
So really the question for me is when do you change the signs?
Thankyou very much
Scott Young

Click here to see answer by stanbon(75887)

Question 72860: Solve by the addition method
7x-4y=-3
x+2y=5

#24
x-y=3
-6x+6y=17
Click here to see answer by checkley75(3666)

Question 72859: Solve each system by the substitution method:
#42
7y=9x
-3x=4y

Click here to see answer by checkley75(3666)

Question 72830: by using subsitution of linear systems how do you figure out this problem?
x+y=4
-5+2y=-6

PLEASE HELP CUZ IM NOT UNDERSTANING THIS
Click here to see answer by jim_thompson5910(35256)

Question 72925: Solve the Following:
x-2y=2
2x-z=-2
x-y-2z=4
Click here to see answer by bucky(2189)

Question 72936: Solve the system by substitution.
3x - y = -7
x + y = -9
Click here to see answer by funmath(2933)

Question 72918: Solve the following:
3x-5y+2z=19
5x+2y-3z=-8
-2x+3y+5z=7
Click here to see answer by rmromero(383)

Question 73064: How would you solve and equation with two variables like FOR EXAMPLE: 2x+3y=6 but you need to solve for x
Click here to see answer by mathman409(67)

Question 73172: Could you please help me solve this problem?
-10(8x+1)+8(10x+1)=x-9
= 80x+10+80x+8=x-9
= 70x + 88x =x-9
I am stuck here?
Click here to see answer by Earlsdon(6294)

Question 73209: Sarah has $3.50 in quarters and nickels. She has 2 more quarters than nickels. I need an algebra equation for this. Please help!!
Click here to see answer by ankor@dixie-net.com(22740)

Question 73645: how do you solve for a system of linear equations y=2/3x-1 and y=-x+4
Click here to see answer by checkley75(3666)

Question 73645: how do you solve for a system of linear equations y=2/3x-1 and y=-x+4
Click here to see answer by bucky(2189)

Question 73698: x+9y=9
3x+6y=6
chapter 7 summary & reviw.
Click here to see answer by tazoftroy(22)

Question 73805: 9x-3y=24
7x-3y=20
using the elimination method

Click here to see answer by funmath(2933)

Question 73859: These are systems of linear equations but it says to use linear combination and im not seeing it on the web site.
3b+2c=46
5c+b=11
Click here to see answer by stanbon(75887)

Question 73859: These are systems of linear equations but it says to use linear combination and im not seeing it on the web site.
3b+2c=46
5c+b=11
Click here to see answer by checkley75(3666)

Question 73530: please simplify the following expressions: (4m^2-9n^2)-(5m^2-12mn+9n^2)
Click here to see answer by tazoftroy(22)

Question 74089: Thanks so much for all your help . After see the problem solve i try to work on them to make sure the are right . And i try to see hoe you all get the answer it is helping me to understand my probles .
So if some one can help me with these problems .
1) solve for x .collect xs on the LEFT side .The solution be presented with x first the correct inequality symbol ,then the number .
I have 10 of these to do .
but please help me with these .
1) 5(2x -1) <-8
2) X + 4 -8x-1≥3(x-2)

3) Name the coordinate described here
From the origin, the point is three places to the right and eight places down..

4) Find the midpoint between these points:
(-2, 7) and (-8,-5)

5) Please help me fill in the chart given this linear equation
Y=5x-4
I have to type all work below in the chart .Please I have 5 of these to do just give me an example on this one more thing where can I get the chart.

6) The linear equation y = 6x-5 graphs as a horizontal/ vertical/ diagonal line (choose the correct label and type it below)

Please tell me where I can get to do the midpoint the art for it.
Thanks .Enida

Click here to see answer by stanbon(75887)

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