Answer:
(a) 3900
(b) 4800
(c) 570000
Step-by-step explanation:
We have given
(a) 
We know the algebraic equation
So 
(b) We know the algebraic equation

(c) We know the algebraic equation

Answer:
the answer is (x )
math way helps
Step-by-step explanation:
-8.9n+7.5
would be your answer
Thanks bro I really needed that