Answer:



Step-by-step explanation:
We are given the following recursive formula:

And consider 
a2

a3

a4

Answer: Stay the same, 100
Step-by-step explanation: well 7%-7% still equals zero. So it’s not effected, I think.
Answer:
x = 170/34 = 5
Step-by-step explanation:
The sum of angle 1 and angle 2 is 180 degrees. They form a straight line.
So, just add the two equations together, set them equal to 180 and solve for x.
12x+19 + 22x - 9 = 180
34x + 10 = 180
34x = 180 - 10 = 170
x = 170/34 = 10/2 = 5