Answer:
28
Step-by-step explanation:
The attached figure shows 7 triangles (counting the original 2). Each has degree-4 rotational symmetry about the center of the figure, so there can be 7×4 = 28 triangles.
Answer:

Step-by-step explanation:
Where p is the distance from focus to vertex, the equation of the parabola with focus at (0, p) is ...

Your parabola has p=9, so the equation is ...

To make m the subject, we must isolate it from everything else. To start, we can subtract x from both sides. This gives us:
-2m = p - x
After this, we divide both sides by -2 to finish isolating m. This would give us:
m = 
Hope this helps! :)
Answer:
8.48528137424
Step-by-step explanation: