mwood8770 mwood8770

24-01-2018
Mathematics

contestada

For an arithmetic sequence where a 1
= 17 and the common difference is 5, find s 7
.
A. 219
B. 235
C. 229
D. 224

Respuesta :

jackiearjona jackiearjona

24-01-2018

The correct answer is C. 224

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Аноним Аноним

24-01-2018

s7 = (7/2)[2*17 + (7-1)*5]

= 3.5 * (34 + 30)

= 3.5 * 68 = 224 answer

D

Answer Link

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