Which weighs more, a pound of cotton or a pound of bricks?

What is the value of x divided into y - z if x = 32, y = 4, and z = 2 3/4?

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.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers