Identifying values in the domain PLS HELP

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?