What is the fifth term in the expansion of (3x-3y)^7

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12