On the North High School tennis team, there are 9 more boys than girls. If there is a total of 21 players, how many boys are on the team?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

Which of the following statements are true about the graph of f (x) = 1/4 coz ( x + π/3) - 1? select two of the following that apply.