Trigonometric identities and applications plz

The sum of two numbers is 12 and their difference is 18 what are the two numbers

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6