5(x+4)>2x-7 please help

The diameter of a table is 5 feet. what is the circumference

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?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?