Can anybody demostrate this ? ((/(n! )= 2^n(-1))

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?

Subtract and simplify. (-y^2 – 4y - 8) – (-4y^2 – 6y + 3) show how you got the answer if your answer is right i will mark you

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?