The ratio of the smaller to the larger is 3:9. That can also be written as a fraction,

, which of course can be reduced to

or 1:3. That's your ratio.
The first term is
−
17
and the common difference is
3
15 minus 7 = 8 . 8 + 3 = 11. The answer is 11
Answer:
-56x^9+24x^8
Step-by-step explanation: