Can someone help me please need the answer ASAP

asked Feb 23, 2022 5.7k views

2 votes

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5 votes

Answer: 445.5 (choice C)

Work Shown:

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

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

Farwa answered Feb 27, 2022

by Farwa

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