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Mathematics 13 Online
OpenStudy (amistre64):

i wanna ask a question too :)

OpenStudy (amistre64):

what? now post in the chat for me? lol

OpenStudy (amistre64):

i was robbed lol

OpenStudy (anonymous):

hey can you help me with a question?

OpenStudy (amistre64):

where is it? or what is it? :)

OpenStudy (anonymous):

i have to find center, vertices, co-vertices, foci, and eccentricity of an ellipse

OpenStudy (amistre64):

eccentricity = .... c/a? gotta look that up again lol

OpenStudy (anonymous):

ok thats fine but i have no idea i wasnt in school when this was taught lol

OpenStudy (amistre64):

its c/a :) or distance from center to focus/ distance from center to edge

OpenStudy (amistre64):

whats the ellipse you got?

OpenStudy (anonymous):

(x-3)^2/16 + (y+6)^2/4 = 1

OpenStudy (amistre64):

ellipse has the major axis corresponds to the bigger number on bottom; for this thats the x component right?

OpenStudy (anonymous):

i think thats the b value

OpenStudy (amistre64):

center = 3,-6 and it rides parallel to the x axis a = major axis; and b is the minor axis a = sqrt.16 = 4 b = sqrt.4 = 2 vertexes are (7,-6)(-1,-6)

OpenStudy (amistre64):

the minor vertexes are (3,-4)(3,-8)

OpenStudy (amistre64):

the eccentricity = sqrt(16+4)/4

OpenStudy (amistre64):

eccentricity = sqrt.5

OpenStudy (amistre64):

i got that wrong lol

OpenStudy (amistre64):

sqrt(16 - 4)/4 sqrt.12/4 sqrt.3 = eccentricity

OpenStudy (amistre64):

sqrt(3) ------ ; ill learn to do this eventually lol 2

OpenStudy (anonymous):

haha ok so the eccentricity is sqrt3/2? or just sqrt 3

OpenStudy (amistre64):

when i do it correctly; and that a big when; it should be sqrt(3)/2

OpenStudy (anonymous):

alright

OpenStudy (amistre64):

sqrt(hyp-leg)/hyp

OpenStudy (anonymous):

what about foci?

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