Hi can someone help me with this math question! :) Please dont put a fake answer <3 This is for my math test! :D

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?