Questions on Algebra: Systems of equations that are not linear answered by real tutors!

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Question 164037: Solve the system below TWICE: graphically and algebraically.
y=-2x+6
y=1/2x-9
Verify that your solutions from the different methods are the same.
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Question 164414: what is the solution of the following system of equations?
y=x+4
y=-2x+1
Click here to see answer by Fombitz(32388) About Me 
Question 165025: x-y+z
x+y+3z
2x-y+2z
The correct answer is suppose to be (4,2,-3). However the answer I keep getting is (-3,1/2, 1 1/2). Can you please help me.
Click here to see answer by Alan3354(69443) About Me 
Question 166057: Im not sure of the formula to solve y=x+z
Click here to see answer by midwood_trail(310) About Me 
Question 166075: find y in the equation
1/y = 1/x + 1/z x=3, and z=5
Click here to see answer by edjones(8007) About Me 
Question 166225: Okay i need step-by-step instructions on how to solve problems like:
1) Solve each system by graphing:
y=3x-4
y=-3x+2
2) y=5/4x-2
y=5/4x-1
Click here to see answer by Fombitz(32388) About Me 
Question 166275: -x+y=-2
-4x-4y=16
Click here to see answer by jim_thompson5910(35256) About Me 
Question 166284: x+y=-4
2x-4y=22
Click here to see answer by Fombitz(32388) About Me 
Question 166348: What is 8.23 x 104 in scientific notation
Click here to see answer by Alan3354(69443) About Me 
Question 166395: Can someone please help me with the following question:
The current I in electrical conductor varies inversely as the resistance R of the conductor. Suppose I is 0.2 amperes when the resistance is 200 ohms. Find the current when the resistance is 250 ohms.
Click here to see answer by Alan3354(69443) About Me 
Question 166395: Can someone please help me with the following question:
The current I in electrical conductor varies inversely as the resistance R of the conductor. Suppose I is 0.2 amperes when the resistance is 200 ohms. Find the current when the resistance is 250 ohms.
Click here to see answer by Mathtut(3670) About Me 
Question 166397: Can someone please help me with the following question:
Find a rational function that has x=4 and x=3 as vertical Asymptotes, and (-2,0) as an x-intercept.
Thanks!
Click here to see answer by oscargut(2103) About Me 
Question 166400: Can someone please help me with the question:
Use the rational zeros theorem to list all possible rational zeros of P(x)=3x^3-5x^2+4x-2
Click here to see answer by oscargut(2103) About Me 
Question 166398: Can someone please help me with the following question:
For, what does Descartes rule of signs tell you about the number of positive real zeros? What does it tell you about the number of negative real zeros?

Click here to see answer by Mathtut(3670) About Me 
Question 166273: -x-3y=-4
3x+y=16
Click here to see answer by jojo14344(1513) About Me 
Question 166394: Please help me with the following question:
Find an equation of variation where y varies jointly as x and z and inversely as the square of w and y=20 when x=-0.5, z=4, and w=5.
Click here to see answer by gonzo(654) About Me 
Question 166543: can someone please show me how to do this problem:
Use the Gauss-Jordan method to solve the system of equations.
x+y+z=7
x-y+2z=7
2x+3z=14
a. 3z+14/2; z/2; z
b. -3z-14/2; z/2; z
c. -3z+ 14/2; z/2; z
d. -3z+14/2; 2z; z
Click here to see answer by stanbon(75887) About Me 
Question 166466: A local electronics store will sell 7 AC adaptors and 3 rechargeable flashlights for $84. what is the price of a single AC adaptor and a single reachargeable flashlight?
Click here to see answer by ankor@dixie-net.com(22740) About Me 
Question 166587: 2/5[15(-10/11)-20=-8(-10/11)+3(-10/11)-6
or
2/5(15p-20)=-8p+3(p-6) and p=-10/11
please help me to solve this. Thank you.
Click here to see answer by edjones(8007) About Me 
Question 166691: Please help with the following equation:
A medical supply company has 1150 worker-hours for production, maintenance, and inspection. Using this and other factors, the number of hours used for each operation, P, M, and I, respectively, is found by solving the following system of equations. Find P, M and I.
P + M + I = 1150
P = 4I - 100
P = 6M + 50



Click here to see answer by ankor@dixie-net.com(22740) About Me 
Question 167351: -2(x-6)
how do i solve this problem
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Question 167290: What is the answer to the following equation: 3/x^2-1/x+5
Click here to see answer by midwood_trail(310) About Me 
Question 167462: (-3,4), (3,-4)
please help me write an equation in slope intercept form of the line passing through the given points.
thanks :)
Click here to see answer by checkley77(12844) About Me 
Question 167537: please help me solve these problems! Thanks!
x^3-3x2-x+3=0
y^2+2y-21=-2y
Click here to see answer by Edwin McCravy(20054) About Me 
Question 167579: solve the following system by any method: x=7/4y+8 4x-7y=32
Click here to see answer by Alan3354(69443) About Me 
Question 167581: ordered pair of (3,6) is a solution of the following system of equations: --9x-2y=-39, 3x+5y=39 True or False
Click here to see answer by Alan3354(69443) About Me 
Question 167621: I just finished my math homework and I have a few that I am not sure if they are correct or not. Here are the problems, along with the answers i came up with. Please let me know if they are correct, or if they aren't correct, what I need to be doing instead.
(from Intermediate Algebra by McKeague Ch 6, secion 2)
2.) (6x^3+12x^2-9x)/(3x)
answer: 2x^2+4x-3
6.) (6y^4-3y^3+18y^2)/(9y^2)
answer: 2y^2-y+2
14.) (x^2-x-6)/(x+2)
answer: x+3
20.) (x^3+8)/(x+2)
answer: x-2
28.) (3x^3-5x^2+2x-1)/(x-2)
answer: [x^2(3+5)+2x+1]/(x-2)
32.) (9y^3-6Y^2+8)/3Y-3)
answer: 3y^2y[(8-3y)/(3y-2)]

thanks!
Click here to see answer by Fombitz(32388) About Me 
Question 167734: i have some problems with this system ? can you tell me how to solution sytem
sytem is x^3 + y^3 = 1
x^2y + 2xy^2 + Y^3 = 2
please contact with me as soon as you can
Click here to see answer by Edwin McCravy(20054) About Me 
Question 167813: Solve each system by the substitution method. Determine whether the equations are independent, dependent or inconsistent
x = 2y -7
3x + 2y = -5





x – y = 5
2x = 2y + 14
Click here to see answer by midwood_trail(310) About Me 
Question 169161: soybean meal is 14% protein, cornmeal is 7% protein, how many pounds of each should be mixed together in order to get a 280 pound mixture that is 12% protein
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Question 169262: soybean meal is 14% protein, cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280lb mixture that is 9% protein?
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Question 169769: Problem:
An airplane is 12,000 ft horizontally from the airport. The slanted distance to the airport is 13,000 ft. what is the plane’s altitude?

Thank you.
Click here to see answer by vleith(2983) About Me 
Question 169769: Problem:
An airplane is 12,000 ft horizontally from the airport. The slanted distance to the airport is 13,000 ft. what is the plane’s altitude?

Thank you.
Click here to see answer by Alan3354(69443) About Me 
Question 170337: Solve by elimination
8x + 7y = -16
6x - 3y = -12
Click here to see answer by checkley77(12844) About Me 
Question 170341: Solve the problem. Two angles are supplementary, and one is 5 degrees more than six times the other. Find the larger angle.
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Question 170344: Solve the problem. Andy has 8 coins made up of quarters and half dollars, and their total value is $2.50. How many quarters does he have?
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Question 170347: Solve the problem. Helen Weller invested $15,000 in an account that pays 12% simple interest. How much additional money must be invested in an account that pays 15% simple interest so that the total interest is equal to the interest on the two investments at the rate of 13%?
Click here to see answer by Mathtut(3670) About Me 
Question 170346: Solve the problem. Ron and Kathy are ticket-sellers at their class play, Ron handling student tickets that sell for $2.00 each and Kathy selling adult tickets for $5.50 each. If their total income for 30 tickets was $105.50, how many did Ron sell?
Click here to see answer by Mathtut(3670) About Me 
Question 170339: Solve by elimination
-6x - 2y = -5
-12x - 4y = -10
Click here to see answer by checkley77(12844) About Me 
Question 170335: Solve the problem. The difference between two numbers is 4. Two times the smaller number minus four times the larger is -28. What are the numbers?
Click here to see answer by checkley77(12844) About Me 
Question 170342: Solve the problem. There were 37,000 people at a ball game in Los Angeles. The day's receipts were $262,000. How many people paid $11 for reserved seats and how many paid $6 for general admission?
Click here to see answer by Mathtut(3670) About Me 
Question 170332: Solve by the substitution method
-5x - 4y = -48
-3x + 2y = 2
Click here to see answer by Edwin McCravy(20054) About Me 
Question 170327: Decide whether or not the ordered pair is a solution of the system
(1, -3)
2x + y = -1
3x + 2y = -3
Click here to see answer by checkley77(12844) About Me 
Question 170329: Decide whether or not the ordered pair is a solution of the system
(12, 6)
y = 1/2 x
2x + y = 18
Click here to see answer by midwood_trail(310) About Me 
Question 170330: Solve using the substitution method
x + y = -4
y = -3x + 2
Click here to see answer by jojo14344(1513) About Me