Simple....
you have:

You're trying to find b..so isolate it...

leaving you
a=c*b
still not done....


Thus, your answer.
Answer:
Holocene
Step-by-step explanation:
The Holocene began 11,700 years ago after the last major ice age.
Answer:

Step-by-step explanation:
Keep
and group -3x+8x which becomes 5x. Then keep -6.
Then it becomes the answer above.
Answer:
617 ^ 15
Step-by-step explanation:
If the bases are the same when multiplying, add the exponents
617 ^ 9 * 617^6
617 ^(9+6)
617 ^ 15