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Mathematics 5 Online
OpenStudy (anonymous):

What is the common difference of a 57-term arithmetic sequence where the first term is -25 and the sum is 17,727?

OpenStudy (ghazi):

17727= 57/2 ((2*-25)+ (57-1)d) now solve for d

OpenStudy (anonymous):

I got 12

OpenStudy (ghazi):

622= -50 +56d, now solve for d

OpenStudy (ghazi):

yes it's correct

OpenStudy (anonymous):

Thx

OpenStudy (ghazi):

anytime

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