F varies jointly as g, h, and j. One set of values is f = 18, g = 4, h=3, j=5. Find f when g = 5, h=12, and j=3

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