ANSWER
The correct answer is B
<u>EXPLANATION</u>
The first function is

We make y the subject to obtain;

Let us quickly write this in the vertex form.



Since the
is negative, the graph opens up.
The vertex is at 
The y-intercept is 
The x-intercept is found by equating the function to zero.





With these information we can quickly sketch the graph as shown in the attachment(the red graph).
For the second function,

we again make y the subject to obtain,

This is a basic quadratic function that can be graphed easily. Note that it is also a maximum graph.
From the graph the solution to the two functions is

Answer:
oofyios
Step-by-step explanation:
It’s c i think sorry if i’m wrong
The length of AB is 9.
Solution:
Given data:
Radius OC = 8
Tangent AC = 15
The angle between the tangent and radius is always right angle.
∠C = 90°.
Hence OCA is a right triangle.
Using Pythagoras theorem,
<em>In a right triangle square of the hypotenuse is equal to the sum of the squares of the other two sides.</em>




Taking square root on both sides of the equation, we get
OA = 17
OB is the radius of the circle.
⇒ OB = 8
AB = OA – OB
= 17 – 8
= 9
AB = 9
Hence the length of AB is 9.