SOLUTION: What is the 58th term of sequence 540, 495,450?

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Question 1165510: What is the 58th term of sequence 540, 495,450?
Found 2 solutions by josgarithmetic, Edwin McCravy:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Not really enough terms to find a rule which the sequence follows

Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
Instead of doing yours for you, I'll find the 47th term of the sequence
560, 505, 450, 

First subtract the 2nd term minus the 1st term, 505-560 = -55
Now subtract the 3rd term minus the 2nd term,   450-505 = -55

So this is an arithmetic sequence since they are the same, and the
first term a1 = 560, and the common difference = d = -55 

The formula is:

a%5Bn%5D=a%5B1%5D%2B%28n-1%29d

Substituting:

a%5B47%5D=560%2B%2847-1%29%28-55%29

a%5B47%5D=560%2B%2846%29%28-55%29

a%5B47%5D=-1970

Answer: -1970

Now do yours the exact same way.

Edwin