T could be located at 15 because 5 plus 15 equals 20
There is 15 bars in each case.
Subtract 8 from 143 and you get 135.
Divide 135 by 9 and you get 15 :)
Answer is 9(-2)=-18 but that choice doesn't appear in your list of answers
A+(n-1)d=nth term
a----first term(260)
d----common difference(-52)
Hope it helps!!
