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

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Question 550485: HEEEEELLLPPPP please.....solve by the elimination method....... x + 4y = 21 and -x + 3y = 0.......type an ordered pair
Click here to see answer by jim_thompson5910(35256)

Question 550486: HHHHEEELLLPPPP.....one more please??? solve using substitution method......5x + 7y = -23 and -8x + y = 49 type an ordered pair
Click here to see answer by scott8148(6628)

Question 550506: HELP!!!!! PLEASE........solve using substitution method....
8x + 2y = 0
-7x + y = 22
type an ordered pair
Click here to see answer by jim_thompson5910(35256)

Question 550512: -2x � 8y = -42
-4x + 6y = -18
Click here to see answer by jim_thompson5910(35256)

Question 550539: HELP PLEASE?????
solve using substitution method
3x + 9y = 57
-7x + y = 65
type an ordered pair
Click here to see answer by jim_thompson5910(35256)

Question 550711: solve the system of equations by graphing. then classify the system: 4x-y=10 4x+5y=-26
Click here to see answer by stanbon(75887)

Question 550713: -8x � 4y = -68
x + 3y = 16
Click here to see answer by jim_thompson5910(35256)

Question 550736: -8x � 2y = -28
-3x + 5y = 47

Click here to see answer by jim_thompson5910(35256)

Question 550785: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-x + 6y = 54
3x + y = 9
robert.russell1969@yahoo.com
Click here to see answer by jim_thompson5910(35256)

Question 551102: 7x-8y=11
8x-7y=7
Click here to see answer by jim_thompson5910(35256)

Question 551000: give an counterexample for the foolowing statement: if the graphs of the equations of a linear system have the same slope, then the linear system has no solution
Click here to see answer by Edwin McCravy(20056)

Question 551163: (1)/(3)y=(1)/(3)x+(5)/(3)
x-3y=5
Click here to see answer by Alan3354(69443)

Question 551293: If the temperature on a Celsius scale is multiplied by three and added to two times the reading on a Fahrenheit scale, the result is 460. Five times the Celsius reading plus four times the Fahrenheit reading is equal to 860. Find the temperature on each scale. Please help me!!!!!
Click here to see answer by bucky(2189)

Question 551330: 4x+y=21
-2y+6y=9
Click here to see answer by Alan3354(69443)

Question 551325: 5x+4y=83
3x-3y=-12
Click here to see answer by Alan3354(69443)

Question 551553: 2x+3y=9
3x+4y=5
Click here to see answer by mananth(16946)

Question 551608: x+2y=23
5x+10y=55
Click here to see answer by mananth(16946)

Question 551733: I am trying to graph a problem. My book does not give clear directions how to do it on my calculator (which I am supposed to do). The problem is: y=x^3 - 3x^2 + x-5 I would like to know how to do this on the calculator. Thank you.
Click here to see answer by Alan3354(69443)

Question 551760: Question: Find the slope and y-intercept of the line given by 2x+3y=5. I don't know how to work this. Is it possible to do on a TI-83 calculator? If so, how?
Answer: Slope=_________ y-intercept=____________
Click here to see answer by Alan3354(69443)

Question 551777: Solve the following system of equations using either the substitution or a
ddition method.
2x-y=-2
3x + y=7
I have tried and tried on this one and can't figure it out. My book does not give me any help.
Click here to see answer by Alan3354(69443)

Question 551780: By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.
Click here to see answer by richard1234(7193)

Question 551778: Solve x^2 + x - 42=0
x= Is the answer 6?
Click here to see answer by nyc_function(2741)

Question 551778: Solve x^2 + x - 42=0
x= Is the answer 6?
Click here to see answer by MathTherapy(10552)

Question 551778: Solve x^2 + x - 42=0
x= Is the answer 6?
Click here to see answer by jim_thompson5910(35256)

Question 551787: Thank you for your help. I would like to know how to use the calculator to do this. By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.
Click here to see answer by Edwin McCravy(20056)

Question 551791: Solve 16 + 3 =5
________________
x+5 x-2
Click here to see answer by Alan3354(69443)

Question 551788: Janie's Crafts produces bracelets. The weekly profit the company receives for selling x bracelets is given by P9x)= -0.01x^2 + 50x - 30,000; P(x) is the profit. Because you cannot sell a negative number of bracelets, for the following questions only consider the function for x> 0.
Use your graphing calculator to graph P(x), where you should consider a y window size around + 40,000. (T83)
hOW MANY BRACELETS NEED TO BE MADE TO MAXIMIZE PROFIT?
What is the max profit?

Click here to see answer by richard1234(7193)

Question 547475: 2x+y=5 2x+y=1
Click here to see answer by jim_thompson5910(35256)

Question 551996: Solve each of these systems using the substitution method.
2x + 3y = -4
x - 2y = 5
Any help will be Greatly Appreciated!
Click here to see answer by 10301650(32)

Question 552418: x+2y=-1
2x-3y=12
Solve using substitution.
Click here to see answer by stanbon(75887)

Question 552429: 2x+3y=9
3x+4y=5
Solve using substitution
Click here to see answer by mananth(16946)

Question 552489: Arnel invest some of his savings at 4 percent per year and an equal amount at 7 percent per year.His income totals ₱33 000 a year.How much did Rico invest at each rate?
Click here to see answer by JBarnum(2146)

Question 552628: Algebra: How would you plot the second line and why would you plot it like that is there a rule?

X -> 3X+2
-2 = -4
-1 = -1
0 = 2
1 = 5
2 = 8

I get that the first number line will have -2,-1,0,1,2 on it but what about the 2nd one?
Click here to see answer by jim_thompson5910(35256)

Question 552680: 2x=-4y+10
6y=-3x+12
Is it no solution?

Click here to see answer by jim_thompson5910(35256)

Question 552787: 13. Write the slope-intercept equation for the line that passes through (-5, -8) and is perpendicular to 10x � 6y = -11.
Click here to see answer by mananth(16946)

Question 552815: how do system of equations using substitution x+y=4 2x+3y=9
Click here to see answer by jim_thompson5910(35256)

Question 552820: Need to know how to work out this problem! 3x+y=8
-2x-y=6
Click here to see answer by mananth(16946)

Question 552820: Need to know how to work out this problem! 3x+y=8
-2x-y=6
Click here to see answer by Alan3354(69443)

Question 552831: I have homework for Algebra. I tried everything I know how to do. Can you help by showing me how to do it? The problem is -.3x+y=.5 , .5x-.3y=1.9 I know the answer because it was given to me by the yeacher. I just have to show how to do it. Please help!!!!!
Click here to see answer by stanbon(75887)

Question 553173: How to solve by elimination?
x+y=7
x+3y=11
Click here to see answer by stanbon(75887)

Question 553397: How do you put 3y=18=-8x+3 in slope intercept form ? can you please tell me in details how you got the answer. thank you soooooo much for your time
Click here to see answer by mananth(16946)

Question 553405: Good evening ,
I need to know how to put this equation : 3y+18=-8x+3 in slope-intercept form. Can you please put in detailed information how you put it in slope intercept form .
Click here to see answer by Alan3354(69443)

Question 553637: Use either elimination or substitution to find the solutions (if any)
Graph the two lines, labeling the x-intercepts, y-intercepts, and points of intersection

y = 2x + 3 and y = -x � 4
Click here to see answer by mananth(16946)

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