Someone please help with arithmetic sequence you'll receive a medal and fan reward.

Question

nnesha · Answer

do you know the formula ??

anonymous · Answer

you can use the trial and error @shaleiah try one by one if you don't know the formula

anonymous · Answer

-573 -(- 373 ) NOT  573 - 373

shaleiah · Answer

oh wait -200

shaleiah · Answer

it's -573--373

nnesha · Answer

27 -200 is -173 
now keep subtracting 200

nnesha · Answer

yeah i know that 
we did that just check what is subtraction to get previous  term
  you can do that -573 + 373

nnesha · Answer

negative and negative become positive in the middle

nnesha · Answer

now subtract 200 in every term 
let know if you getting same number which are in the question

nnesha · Answer

ohhh well because in your answer choice all d are -200 
so it should be -200 (  i just see that ) ;)

shaleiah · Answer

-173-27=-200

nnesha · Answer

|dw:1413935155940:dw|
this is formula which you should remember