ANSWER

EXPLANATION
It was given that;

and

We want to find an expression for the composition function;


We substitute x² into f(x)=7x-9
This will give us:

Answer:
A. geometric
Step-by-step explanation:
The rule is to divide by 2: if you are dividing or multiplying between each term, then the sequence is geometric.
Arithmetic sequences add or subtract the same number between each term.
Hope this helps.
Simply plug in numbers!! (3x-1)(5)=55
15x-5=55
15x=60
x=4
hope this helps :)