Katerina runs 15 miles in 2 1/2 hours what is the average number of minutes it takes her to run 1 mile?

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Sketch one cycle if the cosine function y=2cos2theta