Write an equation of a parabola that opens to the left, has a vertex at the origin, and a focus at (–9, 0.
1 answer:
The standard equation of parabola:
(y-k)²=4p(x-h), with:
a) vertex = (h,k)
b) focus = (h+p, k)
c) directrix = (x=h-p)
Since this parabola has a vertex at (0,0) that means h=k=0
Hence the equation becomes: y²=4px, let's calculate p:
focus is given (-9,0) Remember h+p = -9 & since h=0, then p= -9
===> y²= - 36x
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Answer:
The answer to the problem is C
Answer:
180cm3
Step-by-step explanation:
4x12x3=144
2x2x9=36
144+36=180cm3
I'm sorry that it's past 11pm, but if it still helps, the answer is 204/-576 which simplifies to 51/-144