# A real life situation that involves arithmetic sequences

1
by parasyangon

2015-07-26T16:42:04+08:00

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Zelle is working on her TLE project. She has to make a handicraft scarf. She already knitted 61 rows. Each day, she adds 17 more rows.
Question: How many rows does her scarf has 16 days later?
Given:                                                                          Solution:
a1 = 61
an = a1 + (n -1)d

d = 17                                                              a16 = 61 + (16 - 1)17

n = 16                                                                    = 61 + 255

a16 = 316                         Final Answer: After 16 days, her scarf has already 316 rows.
I got that from this website: http://slideplayer.com/slide/224032/#