Can someone help me please need the answer ASAP

Mathematics

1 answer:

KiRa [710]3 years ago

7 0

Answer: 445.5 (choice C)

Work Shown:

$S_n = \frac{n}{2}(a_1+a_n)\\\\S_{11} = \frac{11}{2}(8+73)\\\\S_{11} = 5.5(81)\\\\S_{11} = 445.5\\\\$

Adding the first 11 terms of this arithmetic sequence yields the sum 445.5

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