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

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Question 203755: I really need help understanding how to answer these questions using the addition method...I want to learn this!!! For some reason I am just not getting it???
12.) x-2y=-1
-x+5y=11

16.) 3x+5y=-11
x-2y=11

22.) 2x=2-y
3x+y=-1
Thank you, thank you, thank you!!!!
Click here to see answer by stanbon(75887)

Question 203932: Can anyone please help me get past the last 2 math problems....I keep trying and each time I get a new answer!!! Thank you!!!The directions say to solve by using the addition method....
36.)
3/7x + 5/9y=27
1/9x + 2/7y=7

44.)
3x-2.5y=7.125
2.5x-3y=7.3125
Thank you! Thank you! Thank you!
Click here to see answer by Alan3354(69443)

Question 204102: the perimeter of a rectangle is twice the sum of its length and its width. The perimeter is 28 meters and it's length is 2 meters more than twice it's width. What is it's length?
Click here to see answer by ichudov(507)

Question 204179: Addition method
x+y=7
x-y=9

x-2y=-1
-x+5y=4

3x + 5y = -11
x- 2y = 11

2x= 2-y
3x + y =-1

Click here to see answer by PRMath(133)

Question 204191: Suppose that a household's monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, HCF). When graphed, the function gives a line with a slope of 1.35.
If the monthly bill fro 16 HCF is $24.35, what is the monthly bill for 20 HCF?
I know that linear functions are x+y=z, I need help setting up the problem. Could you please help me!!!???!!!
z(monthly cost)= x(HCF)+ y or
monthly bill=1.35x + 20 or
20=1.35x + y PLEASE HELP!!
Question is not from a book...it's a quiz question.
Click here to see answer by scott8148(6628)

Question 204243: How do you solve x3/2-4x3/4+3=0, I don't know where to start?
Click here to see answer by Theo(13342)

Question 204406: write y in terms of x
3x-2y+-6
Click here to see answer by stanbon(75887)

Question 204404: -2x -8y = -3
-10x -2y = -6
This is from a CNOW project.
If the system is to be solved using the addition method, by which constant should one of the equations be multiplied if the x terms are to drop?
-5 , 2 , 1/5 , or -2
Click here to see answer by stanbon(75887)

Question 204399: y+1/4- y-1/6 = y+5
Click here to see answer by stanbon(75887)

Question 204405: 3x-3y=3
2x+y=2
Click here to see answer by checkley77(12844)

Question 204662: solve the following system by any method

Click here to see answer by ichudov(507)

Question 204779: write y in terms of x?

(-x/3)+(y/2)=(5/8)
I dont understand this? Are we solving for y or x?
Click here to see answer by alicealc(293)

Question 204697: There N stations on a railroad.
After adding X stations on the rail route 46 additional tickets have to be printed.
Find N and X.
Click here to see answer by scott8148(6628)

Question 204716: Solve the system of equations using the addition (elimination) method.
If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is "no solution" or "infinitely many solutions" and state how you arrived at that conclusion.
5x - 3y = 1/3
-10x + 6y = 2/3

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

Question 204910: Determine whether the system is consistent, inconsistent, or dependent.
3x - 3y = -9
9x - 9y = -27
Click here to see answer by stanbon(75887)

Question 204869: Developing a deep understanding of linear relationships is an important part of the algebra curriculum. One way to analyze these relationships is to examine the way linear equations are represented symbolically, before they are graphed. Review the Semantic Feature Analysis activity, and then think about the following:
Do the graphs of y = x and y = x + 2 intersect with each other?

How could you answer this question without actually graphing each equation?

How would you describe the relationship between the symbolic representation for these lines and their graphs?

Click here to see answer by stanbon(75887)

Question 205130: Can someone help me with this, I have looked in my text and can't find it. How do I form a linear equation in one variable and in two variables.
Click here to see answer by Alan3354(69443)

Question 205132: In a lab experiment 4 grams of acid were produced in 10 minutes and 15 grams in 50 minutes. Let y be the grams produced in x minutes. Write an equation for grams produced.
Click here to see answer by Edwin McCravy(20056)

Question 205174: The cost of water(in dollars) is a linear fuction of the amount of water used(in hundreds of cubic feet,HCF). The cost of using 18 HCF is $39.35 and the cost of using 55 HCF is $104.10. What is the cost of using 53 HCF of water
Click here to see answer by stanbon(75887)

Question 205153: Could someone show me an examplwe of an exponential function converted to a logarithmic function?
Click here to see answer by Earlsdon(6294)

Question 205363: what is the correct way to write the soultion: 4x + 5y=10, 8x +10y=20
Click here to see answer by alicealc(293)

Question 205551: I'm having problems solving this problem as a system of equations. Please help. Thanks.
The sales representatives informs you that there are two floor plans available. There are a total of 56 houses available.
Plan A is x+y=56 and Plan B is x+3y=56. Use substitution to determine how many of each type of floor plan is available, and what are the intercepts of the equation from x+y=56 and from x+3y=56. where would the lines intercept?
*this is so confusing to me, thanks.
Click here to see answer by stanbon(75887)

Question 205584: Please help me solve this equation!
2x+6y=17 and 5x+6y=29
Click here to see answer by solver91311(24713)

Question 205865: Solve by substitution method
5x + 7y =10
x= 5-2y
What is the solution pair
Click here to see answer by Alan3354(69443)

Question 206059: Solve each system by addition.As part of your answer indicate whether the equation are independent, dependent, or inconsistent.
x-y=3
-6x+6y=17
Click here to see answer by stanbon(75887)

Question 206062: if trains a and b are travelin gthe same direction on parallel tracks. train a is traveling at 100 mph and train b is traveling 120 mph. train a passes a station at 9:20 am if train b passes the same station at 9:32 amd at what time will train b catch up to train A
Click here to see answer by ankor@dixie-net.com(22740)

Question 206061: solve the following system of equations
x +3y =9 (1)
x=5-3y (2)
Click here to see answer by ankor@dixie-net.com(22740)

Question 206061: solve the following system of equations
x +3y =9 (1)
x=5-3y (2)
Click here to see answer by checkley77(12844)

Question 206096: How do you solve a linear equations with Gaussian elimination?
x+ y + Z =9
2X- 3y +4z =7
X- 4y + 3Z =-2
Click here to see answer by Edwin McCravy(20056)

Question 206275: Given: P1 (2,-3) & P2 (3,2), Construct the slope-intercept of the line.
Click here to see answer by Targetweek(62)

Question 206288: y = x + 4
3y - 5x= 6 Solve by substitution
Click here to see answer by scott8148(6628)

Question 206288: y = x + 4
3y - 5x= 6 Solve by substitution
Click here to see answer by checkley77(12844)

Question 206286: solve by substitution y = -3x +19
y = 2x-1
Click here to see answer by scott8148(6628)

Question 206287: y = -4x - 7 is asking me to slove by substitution and determine whether
y = 3x the equation is independent, dependent or inconsistent
Click here to see answer by stanbon(75887)

Question 206456: Problem # 70
x + 3y = 2
-x + y = 1
Problem # 36
y = -3x + 19
y = 2x - 1
Problem # 24
4x + 5y = -2
4y - x = 11
Click here to see answer by jim_thompson5910(35256)

Question 206546: Are linear equations and linear functions the same? Why or why not?
Click here to see answer by jim_thompson5910(35256)

Question 206014: 3/4=1-3x-2/x+1
really means 3/4 = 1 - (3x-2)/(x+1) ?
Click here to see answer by mickclns(59)

Question 206601: solve by substitution
x + 3y = 2
-x + y = 1
Click here to see answer by Marth(57)

Question 206603: solve by system of addition
2x = 2 - y
3x + y = -1
Click here to see answer by checkley77(12844)

Question 206602: solve by system of addition 3x + 5y = -11
x - 2y = 11
Click here to see answer by checkley77(12844)

Question 206600: solve by substitution 2x - y = 4
2x - y = 3

Click here to see answer by Marth(57)

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