The ratio of the number of men to the number of women in a room is 7 : 4. There are 9 more men than women. How many people are there in the room?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

The angle of elevation from point a to the top of a cliff is 38 degrees . if point a is 80 feet from the base of the cliff , how high is the cliff ?

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30