The equation would be 4n=8000
to solve, divide 8000/4=2000, she has collected 2,000 signatures so far
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Any arithmetic sequence can be expressed as:
a(n)=a+d(n-1), a=initial term, d=common difference, n=term number
In this case a=5, and d=-2 so
a(n)=5-2(n-1) which can be simplified...
a(n)=5-2n+2
a(n)=7-2n
The domain is restricted to integers from 1 to +oo.
5/6 I think tahts the answer hope this helps
