Lets say, unknown number = a = 1.7
A. a/1.7 = 0.1 -> a = 0.17
B. 0.1/a = 1.7 -> a = 0.05
C. a/17 = 0.1 -> a = 1.7
D. a/0.1 = 1.7 -> a = 0.17
The answer is C
Answer:
27
Step-by-step explanation:
x-15=12
x=15+12
x=27
Assuming the sequence goes on like this 11,-33,99,-297,891,...,
its general formula is

So, the 9th term is