Answer:
f = 27
Step-by-step explanation:
F varies jointly as g, h, and j
f = k* ghj
We know f = 18, g = 4, h=3, j=5.
Substituting these in
18 = k* 4*3*5
18 = k* 60
Divide each side by 60
18/60 = k*60/60
3/20 = k
f = 3/20 *ghj
Now we need to find f when g= 5, h=12,and j=3
f = 3/20 * 5*12*3
f = 27
