The difference between eight and twice a number, x, is four.

What are the values of m∠abc, m∠cbf, m∠abd and m∠dbe in the given figure? explain or show your work?

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.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry