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.