A box contains 8 white socks, 4 black socks and 2 blue socks. If you reach in and pull out one sock, what are the odds that it w
1 answer:
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Equation of an ellipse
→having center (0,0) , vertex ( and covertex
and focus
is given by:
As definition of an ellipse is that locus of all the points in a plane such that it's distance from two fixed points called focii remains constant.
Consider two points (a,0) and (-a,0) on Horizontal axis of an ellipse:
Distance from (a,0) to (c,0) is = a-c =
Distance from (-a,0) to (c,0) is = a + c =
a -c + a +c
= a + a
= 2 a →(Option A )
Answer:
4.25
Process:
- 5=4b-12
- 4b=12+5
- 4b=17
- b=
- b= 4.25