Can anyone help find how to do this! Or explain how to please I’ll give brainleist.

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

Rationalize the denominator- 12x/√x-10