Find the 64th term of the arithmetic sequence -4, -21, -38, −4,−21,−38,

 ; a₁ is the first term, d is the difference between terms, and n is the term

-4, -21, -38, ...   ⇒   a₁ = -4, d = -17

   = -4 - 17n + 17

   = 13 - 17n

    = 13 - 1088

    = 1075

1075

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

answer: what are the following choices