we have

we know that

To multiply two binomial I can use the FOIL method

therefore
the answer is
the missing coefficient of the x-term is 
If you meant “g(f) 3 evaluating it will give you 3gf by just moving the 3. Hope this helps.
6.4/-1.6=-4
Hope this helps
I don't really understand it that much either but I think that the answer is A cause a rectangle has two small sides and two longer sides sooo hope this helps :D
11/3. This is because you multiply the denominator by the mixed number. Than you add the numerator to that. Put that number over the denominator you had in the original problem. Hope this helps!