Homework Help: alg

Posted by jerson on Monday, June 9, 2008 at 9:31pm.

identify the conic section. if its a parabols give the vertex if its a circle, give the center and radius. if it is an ellipse or a hyperbola, give the center and foci.
again my teacher said the answer is ellipse with center (-4,4), foci at (-4ą V3, 4) but dont get how she got it

alg - Damon, Monday, June 9, 2008 at 9:46pm
You have not given us the problem that we are supposed to solve. I can not even reverse engineer it from what you have written. What conic section?
alg - jerson, Monday, June 9, 2008 at 11:05pm
sorry the problem is 4x^2 + 7y^2 + 32x-56y +148=0
alg - Damon, Tuesday, June 10, 2008 at 4:48am
4 x^2 + 32 x + 7 y^2 -56 y = -148

x^2 + 8 x + (7/4)y^2 - 14 y = -37
x^2 + 8 x + 16 + (7/4) y^2 -14 y = -21
(x+4)^2 + (7/4) y^2 - 14 y = -21
(4/7)(x+4)^2 + y^2 - 8 y = -12
(4/7)(x+4)^2 + y^2-8y+16 = 4
(4/7)(x+4)^2 + (y-4)^2 = 4
(x+4)^2 /7 + (y-4)^2/4 = 1
ellipse with center at (-4,4)
a^2 = 7
b^2 4
so a = sqrt 7
b = 2
center to focus = sqrt(7-4) = sqrt 3
etc

Answer this Question

Related Questions

alg2 - identify the conic section. if its a parabols give the vertex if its a ...
Math - The points (4, –5) and (– 4, 1) are endpoints of a diameter of ...
algebra - A few more question Id like for someone to check please. 1) what are ...
Math - Give the equation of the circle with the given center and radius: Center ...
Math/Albebra - Give the equation of the circle with the given center and radius...
Math - Give the equation of the circle with the given center and radius. Center ...
Algebra - Give the equation of the circle with the given center and radius. ...
Math - Give the equation of the circle with the given center and radius. Center ...
Equations of a Circle - Write the standard for of the equation of the circle ...
Physics - Calculate the position of the center of mass of the following pairs of...

For Further Reading

First Name:
School Subject:
Answer: