4x + 10y
Hope it’s right
Best luck with your studying
Answer:

Step-by-step explanation:
height is equal to one third times pi times radius squared times volume
Ok let’s say he folds N=14 so F would be the other q4
Im assuming you mean 20pence? if so its 5 twenty pence in a pound so times 5 by 9 gives you 45
so there are 45 twenty pence in £9