2x^2-2x-12=0 , what are the two equations?

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?

How do i put 3(x+7) in distributive property

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2