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Algebra
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OpenStudy (anonymous):
Identify the 31st term of an arithmetic sequence where a1 = 26 and a22 = -226. (2 points)
Question 2 options:
1) -334
2) -274
3) -284
4) -346
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OpenStudy (welshfella):
the common difference = -226 - 26
---------
21
OpenStudy (welshfella):
nth term = a1 + d(n - 1)
where a1 = first term = 26 , n =31 for 31st term and d is calculated as above
OpenStudy (welshfella):
any questions?
OpenStudy (anonymous):
26+-226-26/21*31-1
OpenStudy (anonymous):
@welshfella
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OpenStudy (anonymous):
i dont understand this
OpenStudy (welshfella):
nth term = a1 + d(n - 1
31st term = 26 + (-12)(31-1)
= 26 - (12*30)
OpenStudy (welshfella):
= 26 - 360 = ?
OpenStudy (anonymous):
So its A?
OpenStudy (anonymous):
-334
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OpenStudy (welshfella):
d = -12
OpenStudy (welshfella):
yes A
OpenStudy (anonymous):
thank you :) @welshfella
OpenStudy (anonymous):
can you help me with another one?
OpenStudy (welshfella):
plz create a new question
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OpenStudy (anonymous):
Identify the 35th term of an arithmetic sequence where a1 = -7 and a18 = 95. (2 points)
Question 1 options:
1) 203
2) 197
3) 168
4) 163
OpenStudy (anonymous):
@welshfella
OpenStudy (anonymous):
do u goi to conencitons 8grade
OpenStudy (anonymous):
what ? @jjjd
OpenStudy (anonymous):
connections 8grade
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OpenStudy (anonymous):
no
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