Mathematics
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OpenStudy (saifoo.khan):
What is wrong with this Chat?
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OpenStudy (anonymous):
idk how does it work
OpenStudy (anonymous):
that is mean
OpenStudy (saifoo.khan):
it dosnt update automatically.
OpenStudy (saifoo.khan):
i hav to refresh the page again & again! :/
OpenStudy (anonymous):
oh well wat grade u in
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OpenStudy (anonymous):
could u poss help me
OpenStudy (saifoo.khan):
12.
Sure.
OpenStudy (saifoo.khan):
wht about u?
OpenStudy (anonymous):
11th
and its in algebra 2
OpenStudy (saifoo.khan):
sure, yr ques?
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OpenStudy (anonymous):
hang on let me type it all the way out
OpenStudy (saifoo.khan):
waiting.
OpenStudy (anonymous):
ok lol dont be pushy
OpenStudy (anonymous):
what is the standard equation for a porabola
OpenStudy (saifoo.khan):
y=ax^2+bx+c
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OpenStudy (anonymous):
A parabola has an equation of x 2 + 4y = 0. What is the equation of the directrix
OpenStudy (anonymous):
that 2 is a squared
i only have more questions left including this one can u please help me
OpenStudy (anonymous):
that 2 is a squared
i only have more questions left including this one can u please help me
OpenStudy (amistre64):
x^2 = -4ay is in standard form; where a is the measure from vertex to directix
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OpenStudy (amistre64):
since there are no values modifying the x and y; the vertex should be at the origin
OpenStudy (anonymous):
but what does y equal
OpenStudy (amistre64):
the parabola looks to open down so the directix would be above it
OpenStudy (amistre64):
y = 1 should be the equation for the directix if I see it right
OpenStudy (amistre64):
err... y = -1, might be better
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OpenStudy (anonymous):
the choices that it gives us are -1 then 0 , 4 2
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
A parabola has an equation of 7x 2 = 28y. What is the coordinate of the focus?
OpenStudy (amistre64):
4a = 28; a = 7 it is 7 away from the vertex in the direction that it opens up
OpenStudy (amistre64):
let me rethink that ... the 7 is throwing me off :)
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OpenStudy (anonymous):
ok
OpenStudy (amistre64):
is (0,1) an option for us?
OpenStudy (anonymous):
yers the last two on my hw are true false and can u help me with those
OpenStudy (anonymous):
yers the last two on my hw are true false and can u help me with those
OpenStudy (amistre64):
i can try :)