Homework Help: algebra

Posted by treshia on Tuesday, March 22, 2011 at 4:17am.

Suppose that these 15 measurements are respectively labeled x1,x2,..,x15. (Thus,-27 is labeled x1,62 is labeled x2,and so on.)

Find. 15 over the sum sign and i=1 under the sum sign(x1 + 43)

I ahve no idea how to solve this becaue I never seen this type of math before. Someone please help me!

algebra - drwls, Tuesday, March 22, 2011 at 5:40am
Are you sure that (x1 + 43) after the capital-sigma sum sign is not
xi + 43 ?

It makes no sense otherwise.

If the general term is xi +43, add up the xi values from x1 to x15 and add 15*43 to that sum.

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