It's not a really a question but how to solve these types of questions
let f(x) = 9x − 2 and g(x) = −x + 3. find f(g(

let f(x) = 2x + 2. solve f−1(x) when x = 4.

let f(x) = x + 8 and g(x) = x2 − 6x − 7. find f(g(

let f(x) = x2 − 8x + 5. find f(−1).

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.