Question

http://prntscr.com/38oyga

Answer 1

put 27 in place of x u will get 7 as answer

Answer 2

In f(x), x is input, f(x) is output (answer). Whether inputted for f, you just replace x to that number.

Answer 3

Thanks guys :)

Answer 4

i tried so hard to get the answer but i kept getting it wrong