Can someone help me with this?

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?

Polynomial that can be factored as (3x-4)(3x+4)

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?