It is 5.6 I am almost positive
Answer:

Step-by-step explanation:
FH is the combined lengths of FG and GH.
In an equation, this is:

We already know that FG is 8 and that GH is 14. Thus:

Add:

So, the length of FH is 22.
And we're done!
It's simple, just subtract 3 from 6 because the have the same terms and variables then keep your answer as it should be. you should get 4b³c²+3b²c³