I would say B.
Your starting term is 10, so that is your a1 value. Each time you add 4 to the number before, like 10+4=14 and so on, so that would mean (a-1)+4.
The answer to this is 0<b<1
Answer:
x = 9x5 / 4
x = 45/4
(either one)
Step-by-step explanation:
= 
Multiple known diagonals and divide by number opposite to unknown number (x).
Hope that helped!!! k
Answer:
Step-by-step explanation:
Label each line :D
Answer: the first one
Explanation: If it is a function, then the x-column will never repeat.