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C. Find the sum of the first 10 terms of the arithmetic sequence -16, -6, 4, 14 ... 5pts Sn2 a+in-1) d] a
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Answer:

Sn= 290

Step-by-step explanation:

Sn=n/2[2a + (n - 1)d]

to solve for d:

d= a2 - a1

d= -6 - (-16)

d = 10

Sn= 10/2 [2(-16) + (10 - 1)10]

Sn= 5[-32 + 90]

Sn = 290

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