Vertex form is

where (h,k) is the vertex.
We can see that the vertex of the graph is at (2,0), and that the graph opens downwards, but does not look stretched at all.
Therefore,
a = -1
h = 2
k = 0
and our vertex form equation is

which is answer A
Answer:
55?????
Step-by-step explanation:
$180 taken away from $450 is $220. the rest i'm not quite sure because there wasn't a given price for the music.
Answer:
4/7
Step-by-step explanation:
There are 7 total numbers, and 4 are even. That means the probability is 4/7.