Answer:
b
Step-by-step explanation:
In mathematics: Arithmetic progression, sequence of numbers such that the difference of any two successive members of the sequence is a constant. Geometric progression, sequence of numbers such that the quotient of any two successive members of the sequence is a constant. so i chose b)Sequences
If p||q then, m∠1=m∠3
9x = 117
x = 117/9
x = 13