billy is stacking alphabetical block in the pattern show at the right. The number of block in each stack represent he terms in a sequence. In which stack will billy place the letter "J" at the bottom of the stack?

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.