Mathematics
6 Online
OpenStudy (anonymous):
Help ! {image attached}
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OpenStudy (anonymous):
OpenStudy (primeralph):
which one?
OpenStudy (anonymous):
All of them .
OpenStudy (anonymous):
@primeralph
OpenStudy (primeralph):
chill.
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OpenStudy (primeralph):
.can't really see the stuff.can you type them out?
OpenStudy (anonymous):
Okay.
OpenStudy (anonymous):
1. \[\frac{ x^2 }{ 16 } + \frac{ y^2 }{ 36 }=1\]
Vertices:
CoVertices:
Foci:
OpenStudy (anonymous):
2. 9y^3-4x^3=36
Standard Form:
Vertices:
Foci:
OpenStudy (anonymous):
3. (x-2)^2 = 8(y+1)
Vertices:
Foci:
Directrix:
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OpenStudy (anonymous):
Graph: \[\frac{ (x+3)^2 }{ 4 } + \frac{ (y-1)^2 }{ 25 } = 1\]
Center:
Vertices:
Foci:
OpenStudy (anonymous):
They all need to be graphed.
OpenStudy (primeralph):
what are your answers?
OpenStudy (anonymous):
I don't have any besides the first one. I'm not good with this topic.
OpenStudy (anonymous):
First one I have: Vertices: (0,6)(0,-6)
Covertices:?
Foci: (0,2sqrt5)(0,-2sqrt5)
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OpenStudy (primeralph):
you're doing good,
co-vertices will be the x part, + and - like you did the y part for vertices.
OpenStudy (primeralph):
that is only because the x is less.
larger = vertices
smaller = co-vertices
OpenStudy (anonymous):
(4,0)(-4,0) ?
OpenStudy (primeralph):
yeah
OpenStudy (anonymous):
Okay so what about for #2?
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OpenStudy (primeralph):
post your answers first............I can only help check what you've done....
OpenStudy (anonymous):
I haven't done any others.. I don't know how .
OpenStudy (primeralph):
okay, you got the standard form........
OpenStudy (anonymous):
Okay...?
OpenStudy (primeralph):
plug in 0 for x and 0 for y to find vertices
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OpenStudy (primeralph):
........I'm sorry, I got to go....I'm cooking.
OpenStudy (anonymous):
Okay thank you.
OpenStudy (anonymous):
type in 8 and 9.
OpenStudy (anonymous):
think 7 is right.
OpenStudy (anonymous):
actually, type that too.
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OpenStudy (anonymous):
The questions are typed above.
OpenStudy (anonymous):
See them? @macknojia
OpenStudy (anonymous):
ohh, my bad.
alright so number 8 on your worksheet is a parabola.
OpenStudy (anonymous):
number 9 is an ellipse.
OpenStudy (anonymous):
Okay great. So what are the vertices, foci, and directrix? And how is it graphed?
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OpenStudy (anonymous):
parabola is simple enough.
for the ellipse you find the a and b which will be 2 and 5.
OpenStudy (anonymous):
so its vertically longer than horizontally
OpenStudy (anonymous):
So for #9: whats the center, vertices, and foci?
OpenStudy (anonymous):
hold up my memory is kinda hazy on this..
isnt the focus=sqrt(a^2+b^2)
OpenStudy (anonymous):
I'm not sure I'm no good at this either lol.
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OpenStudy (anonymous):
alright let me check online. check your notes lol
OpenStudy (anonymous):
Alright well I'm gonna go to bed, thanks for the help! :)