Of the 15-year-olds at a karate school, 8 have black belts and 14 have brown belts. among the 16-year-olds, 7 have black belts and 12 have brown belts. which age group has a lower ratio of black belts to brown belts?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?