If ¼ of a gallon covers 2/5 of a wall, then how much paint is needed for an entire wall?

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.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

How many solutions does the nonlinear system of equations graphed below have?