Mathematics 36 Online
OpenStudy (saifoo.khan):

What is wrong with this Chat?

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

OpenStudy (anonymous):

could u poss help me

OpenStudy (saifoo.khan):

12. Sure.

OpenStudy (saifoo.khan):

OpenStudy (anonymous):

11th and its in algebra 2

OpenStudy (saifoo.khan):

sure, yr ques?

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

OpenStudy (saifoo.khan):
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

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

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 :)

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 :)