How do you solve he formulas for numbers 9 and 10?

9)

t = V+K/g, n=multiply both side by g to get :

TG = V+K

 now divide both sides by T to get G alone

 so G = V/t + K/t = g = (V+K)/t

10)l = -a +2S/2

2 x t divided by n

step-by-step explanation:

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.