That's not a real question we will ban you if you keep writing questions like this
The objective here is to find

(so called common ratio):

So assuming the first element of sequence is 3 (as you mentioned) we now can define the recursive rule for this geometric sequence:
And? What happens to her and the calculator?
X = 14
18 + 18 = 36
64 - 36 = 28
28 divided by 2 = 14
Answer:
the right answer is 170
Step-by-step explanation:
so the 90° angle had been divided into 2 so x is 45°
therefore 45×4 is 180 -10= 170