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

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Question 672162: Tell whether the ordered pair is a solution of the linear equation.
x=9; (9,6)
Click here to see answer by ReadingBoosters(3246)

Question 673008: Write the equation of a line that is parallel to y=2x+3 and passes through the points (6,2).
Click here to see answer by ReadingBoosters(3246)

Question 673080: I am trying to solve the following equation. Solving by substitution:
15x-10y=11
15y=-2+5x)
please help!
Click here to see answer by ReadingBoosters(3246)

Question 673099: solve system of linear equation by elimination
a+9b=1
a+3b=-5
Click here to see answer by mananth(16946)

Question 673101: graph x
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Question 673106: An investor invested a total of $1,400 in two mutal funds. One fund earned a 7% profit and the other earned a 2% profit. If the investors profit was $58 how much was invested in each mutal fund?
fund that earned 7%?
fund that earned 2%?
Click here to see answer by mananth(16946)

Question 673232: I need help. The directions are solve each system. If the system has in infinate solution set, specify it and give three solutions. If the system has no solution, say so.
The prolem is:
d = 2 - 6c
(1/2)d - c = 1
Click here to see answer by stanbon(75887)

Question 673227: Solve each system using elimination. Tell whether the system has no solution, one solution, or infinetly many solutions.
-4x - 2y = 20
2x + y = 19
Click here to see answer by ewatrrr(24785)

Question 673387: Show the system,or show it has no solution.
1/2x+3/4y=3
4/3x+2y=8
Click here to see answer by Alan3354(69443)

Question 673488: Solve
3x+y=5
2x-y=0
Click here to see answer by vleith(2983)

Question 673611: The perimeter of a rectangular field is 500 feet. Its length is 1 � times its width. What is its length?
Please help ?!
Click here to see answer by rfer(16322)

Question 673607: Find the solution to the system of equations.
x + y = 4 and y = 2x + 1
I NEED HELP PLEASE !

Click here to see answer by rfer(16322)

Question 673610: Find x by solving for the system of equations using any method you prefer.
-8x + 4y = 9 and 3x = 4y + 6
Please help me !

Click here to see answer by sachi(548)

Question 673610: Find x by solving for the system of equations using any method you prefer.
-8x + 4y = 9 and 3x = 4y + 6
Please help me !

Click here to see answer by lenny460(1073)

Question 673616: Jan has 21 coins. All of the coins are either pennies or dimes. The coins total $.84 in all. Let p = the number of pennies and d = the number of dimes. Which of the following pairs of equations should Jan use to determine how many coins there are of each value?
Please help me !!! thank you!
Click here to see answer by MathTherapy(10552)

Question 673677: Got a couple questions.
Solve and Graph

1. 5x+10y=-20
5/5=1
10/5=2
-20/5=-3
x+2y=-3
2y=x-3 <- Stuck here
How to tell if something is linear?
Minutes 4 9 14 21 27
Money 2.9 4.65 6.4 8.85 10.95
It is not linear because there is no direct correlation.
3. Solve 3/4 (5x-y)<3 for Y Graph the solution
Multiply by reciprocals
3/4*4/3
5x*4/3=20/3x
y*4/3=4/3y
20/x-4/3y<3 <- Stuck here

Click here to see answer by ewatrrr(24785)

Question 674023: trying to help my HS daughter factor (x^3-x^2 y+x y^2-y^3)/(x^4-y^4)
Click here to see answer by Alan3354(69443)

Question 674023: trying to help my HS daughter factor (x^3-x^2 y+x y^2-y^3)/(x^4-y^4)
Click here to see answer by ReadingBoosters(3246)

Question 674023: trying to help my HS daughter factor (x^3-x^2 y+x y^2-y^3)/(x^4-y^4)
Click here to see answer by MathTherapy(10552)

Question 674125: can you solve
-x-y=-2
4x+5y=16
using subsitution method?
Click here to see answer by jim_thompson5910(35256)

Question 674128: solve({4x+2y-6z=-38,5x-4y+z=-18,x+3y+7z=38})
Click here to see answer by 3raser(1)

Question 674213: Which value for x makes the sentence true?
9x = 6x + 15

Click here to see answer by ewatrrr(24785)

Question 674219: -5(4n + 2) = 25
Please help me solve this in algrebric form, so I can show my work. Need help understanding. Thank you
Click here to see answer by ewatrrr(24785)

Question 674276: Which of the following equations will produce a graph with the intersection of two lines at the positive 2 on the x axis?

A. 3x - 2y =6
2x+y=4
B. -3x-2y=6
-2x+y=4
C. 3x + 2y=6
2x-y= 4
D. 3x - 2y =-6
2x+y = -4

Click here to see answer by ewatrrr(24785)

Question 674272: Make a graph for the following equation :
2x + y = 2 and x - y = 1
Please help me !
Click here to see answer by ewatrrr(24785)

Question 674222: 6(5z-1)-5(z+2)=13(z+1)
Can you please help me solve this in algebric form. Thank you
Click here to see answer by jim_thompson5910(35256)

Question 674422: What did the cowboy artist like to do?
Click here to see answer by Edwin McCravy(20055)

Question 674532: Select the best answer that satisfies the equation below and tell why
|3m - 6| = 12
A. -6, 2
B. 9, -9
C. 6, -6
D. -2, 6

Click here to see answer by solver91311(24713)

Question 674600: The number N of state and federal inmates in milloions during year x , whre x _>
2002 can be approximated by the following formula: N-0.04x-78.22. Determine the year in ehich there were 1.9 million inmates. I need to find N and show my work pplease help
Click here to see answer by stanbon(75887)

Question 674820: y=6x-11
-2x-3y=-7
I understand it but I do not understand how to break it all down. Please help!
Click here to see answer by ReadingBoosters(3246)

Question 674892: I am helping my daughter with Grade 7 math homework on Nth term equations.
The question is Find n if the equation equals 20, -n +2.
I think the answer is 22?
Click here to see answer by ReadingBoosters(3246)

Question 674916: 4x+8y=20
-4x+2y=-30
Click here to see answer by Alan3354(69443)

Question 674914: -4x+y=6
-5x-y=21
Click here to see answer by Alan3354(69443)

Question 674949: How to solve this system of linear equation by the substitution method step by step? 4x+6y=2340
x+y=480

Click here to see answer by ReadingBoosters(3246)

Question 674919: x-y=11
2x+y=19
Click here to see answer by ReadingBoosters(3246)

Question 675143: How do I solve a linear equation, where x=y, using Substitution?

Click here to see answer by ewatrrr(24785)

Question 675109: A t-shirt company makes t-shirts and hoodies. They can make between 80 and 100 t-shirts in one day. They can produce between 50 and 80 hoodies in on day. They can make, at most, 160 total units in one day. If the profit on each t-shirts is $6 and the profit on each hoodie is $10, how many of each kind do they need to make a mazimum profit? Wha will this maximum profit be?
Click here to see answer by lynnlo(4176)

Question 675213: can you solve the linear system?
3x - 2y = 5
-x + y = 2
Click here to see answer by jim_thompson5910(35256)

Question 675213: can you solve the linear system?
3x - 2y = 5
-x + y = 2
Click here to see answer by ReadingBoosters(3246)

Question 675181: Solve the following system using the substitution method: x=-3y+4 and 3x+9y=12. I know how to solve the equation using the substitution method, but I don't know how to get my answer correct with the y variable.
Click here to see answer by MathLover1(20850)

Question 675485: i dont understand problems like this
9a-5c=15c solve for c
Click here to see answer by jim_thompson5910(35256)

Question 675485: i dont understand problems like this
9a-5c=15c solve for c
Click here to see answer by stanbon(75887)

Question 675893: Is xy+3y=8 a linear equation. Please show work.
Click here to see answer by MathLover1(20850)

Question 675963: What is the
x-intercept of y=-1500x+17000

Click here to see answer by ReadingBoosters(3246)

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