Answer:

Step-by-step explanation:
Vertex form of a quadratic equation;

Vertex of the parabolas (h, k)
The vertex of the parabola is either the minimum or maximum of the parabola. The axis of symmetry goes through the x-coordinate of the vertex, hence h = -3. The minimum of the parabola is the y-coordinate of the vertex, so k= 7. Now substitute it into the formula;

Now substitute in the given point; ( -1, 9) and solve for a;

Hence the equation in vertex form is;

In standard form it is;

For every one hour 12 seaguls show up
12 seaguls for every one hour
the answer i think is 12 seaguls per hour
I think it is 8.83? I am not positive but it is worth a try
Answer:
true 7x+5y=9
Step-by-step explanation: