Answer:
127.5
Step-by-step explanation:
The given series is 26 + 24.5 + 23 + 21.5 + ... - 17.5
The first term of this series is a=26
The common difference is d=24.5-26=-1.5
The last term of the series is -17.5
The nth term is given by:




n=30
The sum of the series:



120/6=20 20*10=200
The answer is 200
Answer:
12
Step-by-step explanation:
Use the relation between 3 is to 51
eventually... you will
Answer:
what is your question
Step-by-step explanation:
You did not post your question yet
Answer:
(3,1)
Step-by-step explanation: