If a ∥ b and e ∥ f, what is the value of y?

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.

What value of x will make the triangles similar by the sss similarity theorem?

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left