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

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Question 930458: How do I solve this system using elimination? In steps please.
6/x-3/y=-4 and 9/x+9/y=21
Click here to see answer by Alan3354(69443)

Question 930458: How do I solve this system using elimination? In steps please.
6/x-3/y=-4 and 9/x+9/y=21
Click here to see answer by TimothyLamb(4379)

Question 930458: How do I solve this system using elimination? In steps please.
6/x-3/y=-4 and 9/x+9/y=21
Click here to see answer by MathTherapy(10552)

Question 930486: Use the elimination method to solve the following system of equations. what is x-4y+3z=1
-x+y-5z=-10
2x-4y+3z=-3

Thank you!
Click here to see answer by TimothyLamb(4379)

Question 930484: Use the elimination method to solve the following system of equations. what is z,y & z
x-2y+z=3
2x+y-2z=-7
3x-y+z=0

Can't seem to get this one right, Thank you!
Click here to see answer by TimothyLamb(4379)

Question 930680: How many solutions will this system of equations have?
y = -3.5x - 3.5
y = -3.5x + 3.5
Click here to see answer by Alan3354(69443)

Question 930680: How many solutions will this system of equations have?
y = -3.5x - 3.5
y = -3.5x + 3.5
Click here to see answer by MathLover1(20850)

Question 930779: 5(r+4)=d
12(r-4)=d
r is rate, and that is what I am trying to solve for.
Click here to see answer by mananth(16946)

Question 930959: x =2y +7 3x - 2y = 3
Click here to see answer by TimothyLamb(4379)

Question 931605: The equation of a line is x + 5y = 12. What is the y-intercept of the line?
(Points : 1)
Option A: 12
Option B: 12
Option C:
Option D:

Click here to see answer by Fombitz(32388)

Question 931747: Solve the system by graphing. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter DEPENDENT.)
x - y = -1
2x + 3y = 18
Solve the system by graphing. (If the system is inconsistent, enter INCONSISTENT. If the system is dependent, enter DEPENDENT.)
4x + 2y = 18
5x - 4y = 3

Click here to see answer by TimothyLamb(4379)

Question 931778: x+y=4
3x-2y=2
x-y=10

Click here to see answer by Fombitz(32388)

Question 931892: In 1987, there were 4.946 million people registered
to vote in a state. Of these, x million
were registered democrats, y million were registered
republicans, and z million were registered
as independent. The value of x is 0.599
million more than the value of y. The value
of y is 1.356 million more than z. How many
democrats were registered?
Click here to see answer by TimothyLamb(4379)

Question 932193: Find an equation of the line containing the centers of the two circles
x^2+y^2-10x-10y+49 and x^2+y^2-4x-6y+9=0
Click here to see answer by Fombitz(32388)

Question 932525: 8 + x = 13 + 2x
Click here to see answer by Fombitz(32388)

Question 932599: Solve each equation by graphing. If the solution is not unique, identify the system as �inconsistent� or �dependent�
(x)= 2x+y=8
y=2
Click here to see answer by stanbon(75887)

Question 932611: Consider the system of equations
3x + 4y = 8
6x + ty = s
where t and s are real numbers, find values of s and t so that the system has exactly one solution
Click here to see answer by TimothyLamb(4379)

Question 932576: Not every system of linear equations has a single solution. Try to make a sketch of a system of linear equations that does not have a single solution. Compare the equations of these
systems. What is true of their slopes?...y-intercepts?...etc�
Click here to see answer by TimothyLamb(4379)

Question 932753: Use the gauss-Jordan method to solve the following system:
2x + y = 13
-2x + 3y = -1
How do I do this?
Click here to see answer by TimothyLamb(4379)

Question 932860: Please help me whith this i have a test and i have no idea how to do this
Solve the system by graphing
X+y=-2
Y=5x+40
Click here to see answer by rothauserc(4718)

Question 932938: the correct solution.
y = 5x + 39
y = 3.5x + 60
Click here to see answer by ewatrrr(24785)

Question 932989: How many x-intercepts does the graph of y = x2 have?

A)

0

B)

1

C)

2

D)

3

Click here to see answer by TimothyLamb(4379)

Question 932989: How many x-intercepts does the graph of y = x2 have?

A)

0

B)

1

C)

2

D)

3

Click here to see answer by MathLover1(20850)

Question 933015: 3x(6x-4y)-2x(3y-x)+8xy=?

Click here to see answer by MathLover1(20850)

Question 933058: how do you write a system liner equation in two variables?
Click here to see answer by richard1234(7193)

Question 933081: Solve the linear system. Use the method of your choice. 2x - 3y = 6 and 2x + 3y = 6 . answer is an ordered pair
Click here to see answer by josgarithmetic(39617)

Question 933280: I'm having a hard time trying to figure this problem out. It is a 4 part question: A small business purchased a car for $16,000. Its depreciated value after 4 years is estimated to be $7,000. Assume linear depreciation and graph your model.
a)Write a linear model that will predict the value of the car in terms of the time of depreciation.
b)Interpret what the slope is.
c)What does the x and y intercepts represent.
d)Determine the time when the car's value will be $10,000.
Click here to see answer by josgarithmetic(39617)

Question 933329: Anuj pays Rs.34 for 3 pens and 2 pencils.write the given data in two variable linear equation and draw its graph
Click here to see answer by stanbon(75887)

Question 933313: if sum of age of three brothers are 42 and before 10 years ratio of their ages are 1:2:3 then what is the age of younger brother.?
Click here to see answer by ankor@dixie-net.com(22740)

Question 933600: x varies inversely as y. x is 16 when y is 5.find x when y is 2.
Click here to see answer by Alan3354(69443)

Question 933771: System of Equations using the Elimination Method
Looking for the problem worked out, not just the solution set. I am stuck but feel I am following the steps, just not sure where I am getting lost. Thank you.
9X + 2Y = 0
3X - 5Y = 17
I started by multiplying equation 1 by 5, and Equation 2 by 2 to make eliminate the Y's
5(9X+2Y)= 0 45X + 10Y = 0
51X = 34
2(3X-5Y)= 17 6X - 10Y = 34
51X/51 = 34/51 X= 0.666
9(.666 + 2Y) = 0
5.994 (rounded to 6) + 18Y = 0
6+18Y=0
-6 -6
18Y = -6
Y = .333
Perhaps the decimal is throwing me off?

Click here to see answer by ankor@dixie-net.com(22740)

Question 933851: Solve the system of equations by the addition method.
x+5y=-26
-6x+5y=16
Need some help. Thanks.
Click here to see answer by vleith(2983)

Question 933861: Solve the system of equations by the substitution method.
-6y=x+21
3x+5y=11
Please Help.
Click here to see answer by stanbon(75887)

Question 933874: 6a - 5b = 9
2a + 5b = 23
slove this system of equations using the addition method

Click here to see answer by Alan3354(69443)

Question 933961: What is standard form of the coordinates (2,-3) and (4,2)?
Thank you!
Click here to see answer by ewatrrr(24785)

Question 934561: x +y=-2
2x-y=5
Click here to see answer by Alan3354(69443)

Question 934564: -Rewrite the constraints in slope-intercept form.
3x+5y≥35
2x+y≤14

Click here to see answer by DrBeeee(684)

Question 934629: Please help me

substitution
x=y+7
y-8+2x
Click here to see answer by jim_thompson5910(35256)

Question 934631: Please help me

substitution
x=y+7
y-8=2x
Click here to see answer by jim_thompson5910(35256)

Question 934633: elimination
4x + 2y = 34
10x- 4y = -5
Click here to see answer by MathLover1(20850)

Question 934669: Express y in terms of x , it being given that 3x+y-12=0.Check whether the point (3,3) is on the line represented by the equation 3x+y-12=0.
Click here to see answer by rothauserc(4718)

Question 934582: - Rewrite the constraints in slope-intercept form.
X+2y≤24
3x+2y≤34
3x+y≤29
X≥0

Click here to see answer by MathLover1(20850)

Question 934792: Find the value of x
28x+12=4x+444

Click here to see answer by Alan3354(69443)

Question 934835: The perimeter of a rectangular garden is 27 feet. The length of the garden is twice the width. What is the length and width of the garden?
Click here to see answer by vicgonzerx(31)

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