Last week, Shane bought 11 books and 4 movies for a total of $92.
Today, Shane bought 9 books and 9 movies for a total of $144.
Assuming neither item has changed in price, what is the cost
of a book in dollars?

Carlos spent 1 1/4 hours doing his math homework he spent 1/4 of his time practicing his multiplication facts how many hours to carlos been practicing his multiplication facts

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g