Whats the recursive and explicit formula for 2,6,18,54

Pls i’m too dumb to know what i’m doing right now

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)