I don’t like the diagram below and complete that direction

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.

Reflect the point (7,0) across the y-axis

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2