Answer:
Step-by-step explanation:
We have that the focus is at (p,0) and that the directrix is x=-p. Take the point (-p,0) of the directrix. We know that the vertex of the parabola is at the middle point ot the line segment that joins the points (p,0) and (-p,0). To get the middle piont, we take the average coordinate by coordinate. That is, the middle point is . The general formula of a parabola of vertex (h,k) that opens to the right or to the left is given by
Where |p| is the distance from the focus to the vertex. If the parabola opens to the right, then p>0 and p<0 otherwise. In our case, h =0=k, so we get that
Answer:
Im pretty sure its E and C
Step-by-step explanation:
There may be one more:)
Answer:
It can be almost ANYTHING but 2nd and 3rd length have to be bigger than 4
Step-by-step explanation:
You got the 1st length of the triangle, which is 4. And then we can "guess" what those length are. But whatever the length is, it won't be 0, and 2 length add up together will not be equal or less than 4, if you don't understand, draw it on the paper and you will get a straight line.