Consider the quadratic function:
f(x) = x2 – 8x – 9

Vertex:
What is the vertex of the function?
(, )

Step-by-step explanation:

hello :

f(x) = x² – 8x – 9 = (x²-8x+16)-16-9  

f(x) = (x-4)²-25   vertex form

the vertex is : (4 ; -25)

Vertex: (4;-25)

P.S. Hello from Russia

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation:

c

step-by-step explanation:

it would be see because your formula is f(x)=6x, so 6 times 1 is 6 and you go on and the best answer is c.