Plz help me i suck at math

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.

27 is what percent of 108? 27 is % of 108

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)