The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How many students are girls?

If value of cos330° is √3/2 then find tan165°.

Which expression is equivalent to -12(3x-3/4)

Tyler reads 2/5 of a book on monday, 1/3 of it on tuesday, 2/9 of it on wednesday, and 3/4 of the remainder on thursday. if he still has 14 pages left to read on friday, how many pages are there in the book?