Find the nth term for the sequence 30 27 24 21

Assuming that the 30 is term #1 ... The 'n'th term of the series is. T (n) = 33 - 3n or 3 (11 - n).

Find the multiplication by subtracting the second term from the first term

27 - 30 = - 3, so the multiplication table is - 3x.

Now find the deviation of the first term in this sequence from the first term of the original - 3x table

30 - - 3 = 33

So you're adding 33 to the terms to get the sequence given

Final equation is:

-3n + 33