Answer:

Step-by-step explanation:
Given that , the sum of the first nine terms of an arithmetic series is 162 and the sum of the first 12 terms is 288.

<h3>
<u>Related</u><u> </u><u>Infor</u><u>mation</u><u> </u><u>:</u><u>-</u><u> </u></h3>
• The sum of n terms of an AP is
• nth term of an AP is given by ,

Answer:
The answer is A. 12%
Step-by-step explanation:
Answer:
x = 42.67
Step-by-step explanation:
Answer:
10.85
Step-by-step explanation:
hope its right :)
I believe that the answer is 120 marbles.<span />