1 is D, an angle bisector only cuts the original angle in half.
2 is
9x - 18 = 3x
6x - 18 = 0
6x = 18
x = 3
3 is 9(3) - 18 = 27 - 18 = 9
D because they all increase by the same number (+1)
Answer:5
Step-by-step explanation: you have to dived into two groups into five.
The answer is B.
You can't multiply, divide, or subtract because it says find the sum.