Homework Help: math

Posted by roberto on Monday, January 24, 2011 at 10:03am.

what is the sum of the 1st 10 terms of the arithmetic series that has a 10th term of 50 and a 1st term of 5

math - Reiny, Monday, January 24, 2011 at 10:24am
a = 5
term(10) = a+9d
5+9d = 50
9d = 45
d = 5

so you have a=5 and d=5

can you take it from there?
math - Anonymous, Thursday, February 3, 2011 at 1:46pm
325

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