Aof { < 5}? f(x) = (x - 4)^2 +5f(x) = -(x-4)^2 + 5f(x) = (x - 5)^2 + 4f(x) = -(x – 5)^2 + 4

f(x) = -(x-4)^2 + 5

Step-by-step explanation:

The function is a quadratic function. Its graph looks like a parabola. The graph has a vertex of (4,5) and opens up downward.

Proving that for all x:

though don't really understand the question

Step-by-step explanation:

i would say

y= nx

y=180

so 180=n5

divide both sides by 5

180/5= 36

the answer is D= 36