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Mathematics 8 Online
OpenStudy (anonymous):

What is the sum of a 30-term arithmetic sequence where the first term is 74 and the last term is –100

OpenStudy (anonymous):

sum=30(74-100)/2

OpenStudy (anonymous):

so it will be -390?

OpenStudy (anonymous):

i guess, didn't make operations....

OpenStudy (anonymous):

ya, right

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