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 ,

To find the number of wrappers he needs, divide 360 by 40. This is your answer. 360/40 = 9
Answer:
45 Handshakes
Step-by-step explanation:
45 Handshakes have taken place all together