Line, parabola, cirlce, ellipse, or hyperbola?
1] 2y=x^2
2] 108y^2-81x=0
3] y=2x+5
4] 10x^2+10y^2=40

Question

Line, parabola, cirlce, ellipse, or hyperbola?
1]  2y=x^2
2]  108y^2-81x=0
3]   y=2x+5
4]   10x^2+10y^2=40

anonymous · Answer

1. parabola
2. parabola
3. line
4. ellipse

anonymous · Answer

what about: 
121x^2+81Y^2=9801
          &
121x^2-81y^2=9801

anonymous · Answer

ellipse
hyperbola

anonymous · Answer

Thank you . (:

anonymous · Answer

Just ask!

anonymous · Answer

If you had to put 25x^2-4y^2=100 in standard form, would it be 25x^2-4y^2-100=0?

anonymous · Answer

No, standard form is the one has radius to the right side!

anonymous · Answer

So it's already in standard form!

anonymous · Answer

ok, what would be its center and vertices?

anonymous · Answer

center (0,0)

anonymous · Answer

circle just have center and radius!

anonymous · Answer

ok thanks, what about this:

write an equation of the hyperbola with the given foci & vertices:
foci: (8,0),(-8,0)
Vertices: (7,0),(-7,0)

anonymous · Answer

Not sure if I 'm correctly, so I'll get back to you with it!