Help pls.

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?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x