SOLUTION: I do not understand this. I read all about functions but it never talks about the double parentheses. Please help me with this. I tried a couple different thoughts but they were wr

Algebra ->  Functions -> SOLUTION: I do not understand this. I read all about functions but it never talks about the double parentheses. Please help me with this. I tried a couple different thoughts but they were wr      Log On


   

Question 347652: I do not understand this. I read all about functions but it never talks about the double parentheses. Please help me with this. I tried a couple different thoughts but they were wrong.
(1 pt)
Let the function f be defined by
f(x) = 4 x + 4.
Then f(f(9)) =____ and f(f(10)) = ____.
Hint: As always, first figure out what's inside the parentheses.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
How about if I said find f%28z%29 and by the way z=f%289%29.
What would you do?
FIrst you'd solve for z.
Then you'd plug that result into f%28z%29.
But you're really solving f%28z%29=f%28f%289%29%29.
Try that first and see if it makes sense.