Question

Please help!:-)
1-Which term best describes the type of conic identified by the equation 5x^2+5y^2=45?
circle
ellipse
hyperbola
parabola
4- what are the focus and directrix of a parabola with the equation x=1/2y^2?
focus:(0,2); directrix:y=-2
focus:(0, 0.5);directrix:y=-0.5
focus:(2,0); directrix:x=-0.2
focus:(0.5,0);directrix: x=-0.5
5-what is the equation of a parabola with a vertex at the origin and focus (0,1)?
y=x^2
y=1/4x^2
x=y^2
x=1/4y^2
6-what is the equation of a parabola with the vertex (0,0) and directrix x=-1.25?
y=5x^2
x=5y^2
5x=y^2
5y=x^2

Answer 1

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Answer 2

ok one min

Answer 3

Thank you!

Answer 4

Thank you! do you know any of the others? and I have a few more questions if anyone is willing to help.

Answer 5

ya im doing them one min

Answer 6

For the first number, divide all terms by 5.
x^2 + y^2 =9
Isn't that a circle with radius 3?

Answer 7

thats not what i got hold on let me do it again

Answer 8

It Would Help If You Numbered The Questions...

Answer 9

2-Select the graph of 4x^2+16y^2=64. what are its domain and range?
first photo-domain:{x -4<x<4} range: {y -2<y<2}
second photo-domain{x -2<x<2} range:{y -4 <y<4}
third photo-domain:{x -2<x<2} range{y -4<y<4}
fourth photo-domain:{ -2<x<2} range:{y -4<y<4}

Answer 10

Wait, what? Are we just supplying answers?