Answer:
5
Step-by-step explanation:
The nth term of the geometric sequence is

In general the nth term of a geometric sequence is

By comparism;
is the common ratio of the sequence.
Or


Common ratio is

No, the dots make no straight lines
The expanded form is: 800,000,000+70,000,000+ 6,000,000
Part A: first multiply 2 by x and -3, then combine the like terms, after that add 6 from both sides, then subtract 6x from both side, the answer is -5.
4x + 2(x-3) = 4x + 2x - 11
4x +2x -6 = 4x + 2x - 11
6x -6 = 6x - 11
6x = 6x -11 +6
6x = 6x -5
6x-6x= -5
0 = -5
part B) add the like terms