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January 31, 2015

January 31, 2015

Posted by **Pre-Cal** on Monday, October 7, 2013 at 8:48pm.

- Math -
**Steve**, Tuesday, October 8, 2013 at 12:23ama = -5

d = 4

So,

n/2 (-10+4(n-1)) = 400

n = 16

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