There are two parts in the given collection. One contains quarters and other contains dimes.
Let's compare the whole coin collection to the quarters.
One way to represent the ratio is 15 : 7.
The other way is
If A = James's present age, write an expression for his age seven years from now *
2 answers:
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Answer:
the vertex of the parabola is:(-2,0)
the focus of the parabola is:(-2,)
the directrix of the parabola is:y=
Step-by-step explanation:
we know that for any general equation of the parabola of the type the vertex of the parabola is given by (h,k)
where and
therefore by the given data we have h=-2 and k=0
hence vertex=(-2,0)
the general equation of the parabola of the type ; the parabola symmetric around the y-axis has the focus from the centre i.e. the vertex (h,k) at a distance a as (h,k+a) and the directrix is given by y=k-a
so focus is
now the directrix of the parabola is .