What is the approximate circumference of a circle with a radius of 20 inches? use π ≈ 3.14.

a.
125.6 inches

b.
62.8 inches

c.
251.2 inches

d.
120 inches

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?

Simplify. 3(4+4x) (type your answer in with no spaces)

Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. x + y = 5 x + y = 7 {} 1 solution infinite