Question

If u is inviserly proportional to v and if u=12 when v= 3 find u when v=9

Answer 1

as u is inversely proportional to v
uv= constant
so uv= 36
so when v=9
u=36/9
u= 4

Answer 2

Answer:

common=k

uv=k

12*3=k  k=36

u*9=36

u=36

    9

u=4

therefore u=4 when v=9