What are equivalent fractions to these two expressions? expression 1 = (m + 4n) - 2.5m
expression 2 = 1/8y + ( 6y - 5x)

answer both if you can.

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.

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Find the multiplicative inverse of 8-12i