Answer:
n/2[2a+(n-1)d]
12/2[2(-5)+(12-1)6]
66-10=56×6=336
336 is the 12th term
Step-by-step explanation:
8 times 12 is 96
10 times 15 is 150 add them together and get 246
The answer I believe is : D.
~ Hope this is correct, if I'm wrong I'm sorry, have a gr8 day/ night my friend!~
the answer is attached to the picture
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