SOLUTION: Determine the 30th term of the sequence -10, -15, -20...

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Question 840618: Determine the 30th term of the sequence -10, -15, -20...
Answer by TheInstructor(29) About Me  (Show Source):
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-10, -15, -20
Notice the common difference? This is an A.P with a common difference of -5.

d = -5
a = -10
Tn= a+(n-1)d
T30= -10 + (30-1) x -5
Therefore T30 = -155

Hope that helped.