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systems of equations

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Two equations in two unknowns 2009-09-18
Citizen pose la question :
x+-3y=7
-x+4y=7

Penny Nom lui répond.
System of equations - comparison method 2009-01-02
nick pose la question :
Hi, I am doing a project on system of equations by using comparison method, but for some reason or another, i can't seem to find any information on the comparison method at all. So, please would you help me by giving me a website that you know of that has some information on my method. And, if you know the answer, can you please tell me why or when do we use system of equations by using comparison method? Thank You
Robert Dawson lui répond.
One boundary of a pond is parabolic in shape. 2006-01-20
Glenn pose la question :
One boundary of a pond is parabolic in shape. The boundary passes through the points A(-20,45), B(40,40) and E(30,35). The equation of the parabola is of the form y=ax2+bx+c. Find the equation of the parabola and the coordinates of the vertex of the parabola. Any assistance you could provide would be greatly appreciated.
Penny Nom lui répond.
A system of equations 2005-09-02
Gina pose la question :
How do you interpret the solution of a system of equations by the corresponding graph? Demonstrate your answer by the use of an example.
Penny Nom lui répond.
The substitution method 2004-02-14
Keisha pose la question :
I need to solve this problem by using the substitution method.
3x+y=1
x=2y+5
Please help me understand the method to solve.

Penny Nom lui répond.
Systems of equations 2003-11-19
Scott pose la question :

I hope that u can help me....I am a college student taking a class in Pre Calculus.....I have homework due this Friday and it counts a BIG Percentage on my FINAL grade.....I am getting mixed up and can not figure out a few problems.....Please help me.....

Method Of Subsitution

Problem 1. y- 8x = -5
x(squared) + y(squared) = 25

Problem 2. y = x(squared) - 2x - 6
Y = x(squared) - 4

Penny Nom lui répond.

Substitution method 2003-09-14
John pose la question :

Hello, my name is john and while I was finishing up my work I stumbled into these problems. a/4-b=-1
a+b=11
and
6a-b=-5
4a-3b=-8

Thanks a lot. I really need some help :)
John


Penny Nom lui répond.
Systems of equations 2001-03-16
joy pose la question :
How do u solve problems using systems of equations?
~ finding x and y~

ex:

26 = 3x - 2y
42 = 4x + y


Penny Nom lui répond.
Two linear systems 2000-08-01
A student pose la question :
please help me with this homework question. 5/x + 6/y= 19/6 3/x + 4/y =2
hint: let a = 1/x and b = 1/y substitute these expressions into the system to find a and b. Then find x and y.

This is a question I answered wrong on a test: solve the given system for x, y, and z. Express your solutions in terms of a, b, and c.


Penny Nom lui répond.
Simultaneous equations 2000-03-11
Laura Molck pose la question :
My name is Laura Molck and I am in Year 11 in Australia. Please help me with the following. I know that they are all simultaneous equations which I can do but I have trouble with the formulae to work the equations. Can you please help!!

1. A tent manufacturer produces 2 models, Outback and Bushwalker. From earlier sales records it is known that 20% more of the Outback model is sold than the Bushwalker. A profit of $200 is made on each Outback sold, but $350 is made on each Bushwalker. If during the next year a profit of $177,000 is planned how many of each model must be sold?


Penny Nom lui répond.
Linear systems of equations 1998-11-16
Crystal Girvan pose la question :
My name is Crystal Girvan.Im in grade 11. I have a question.We are solving linear systems of equations: comparison method. My questions is. it says

a)use the method of comparison to solve this system a=b-1, 3a+ b=3

b) verify your solutin in a

I dont understand it. please help
Jack LeSage lui répond.

 
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