Answer:
X=50
Step-by-step explanation:
15×2=30
25×2=50
Not sure what you are asking but this statement is true
Answer:
where 
Step-by-step explanation:
Recursive means you want to define a sequence in terms of other terms of your sequence.
The common ratio is what term divided by previous term equals.
The common ratio here is -6/2=18/-6=-54/18=-3.
Or in terms of the nth and previous term we could say:

where r is -3

Multiply both sides by the a_(n-1).
where 
Answer:
2b^5.
Step-by-step explanation:
The Greatest Common Factor of 10 and 26 is 2.
The GCF of b^5 and b^6 is 5^5.
Answer is 2b^5.