<u>Given</u>:
Given that the graph of the quadratic function.
We need to determine the value of a in the function's equation.
<u>Value of a:</u>
The value of a can be determined using the formula,

where (h,k) is the vertex and a is a constant.
From the graph, it is obvious, that the vertex of the parabola is (0,9).
Thus, substituting the vertex (h,k) = (0,9) in the above formula, we get;

-------- (1)
Let us substitute any one of the coordinate that the graph passes through to determine the value of a.
Let us substitute the point (3,0) in the equation (1), we have;




Thus, the value of a is -1.
Hence, Option B is the correct answer.
Since the hiker can move in any direction, the equation that represent the area in which the hiker could be will be the equation of circle with radius r=12 and center (5,10)
The equation of a circle with radius r and center (h,k) is:

The only thing we have left is replace the values to get:

Answer:
C.
Multiply each term inside the parentheses by 3.
Step-by-step explanation:
The vertex is (7,-50)
***rewrite in standard form***
Answer:
last option bottom right
x can be equal or greater than -2