Start at 200. Subtract 8 each time.

Answer 1

That's an arithmetic sequence with A1= 200 and d=-8

AN = A1 + (N-1)(d)

AN = 200 +(N-1)(-8) = 200-8N +8 = 208-8N

AN = 208-8N = the Nth term in the sequence

200,192, 184, 176, 168, 160, 152, ...

A7 = 208-8(7) = 208-56 = 152