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Oksanka [162]
3 years ago
11

Ana’s statistics skills have been improving during her senior year at Fletcher High School. On her first end-of-the-week assessm

ent she scored 57 points, then she scored 61 and 65 on her next two assessments. If her score continued to increase at the same rate, what will be her score on the 9th assessment?
Mathematics
1 answer:
mafiozo [28]3 years ago
4 0
A 1 = 57,  a 2 = 61,  a 3 = 65 ( arithmetic sequence )
a n = a 1 + ( n - 1 ) d
a 2 = a 1 + d
61 = 57 + d
d = 61 - 57
d = 4
a 9 = 57 + 8 * 4 = 57 + 36 = 93
Answer: Her score on the 9th assessment will be 93 points.


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