What is the ratio in the simplest form of a classroom with 9 boys and 27 girls?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?

Shirley spelled 12 of her 15 spelling words correctly on the test. what percentage did shirley get on the test?