The sum of two numbers is 43 in the difference 17 what are the numbers

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.

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?