9. What is the sum of the terms of an arithmetic sequence from a1 = 7 to a10 = 79?
A. 360
B. 405
C. 430
D. 630
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9. What is the sum of the terms of an arithmetic sequence from a1 = 7 to a10 = 79?
A. 360
B. 405
C. 430
D. 630
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Letter C. 430
Step-by-step explanation:
hmm? yan na yon