Can the sum of two irrational numbers ever be a rational number? Can the quotient of two irrational numbers ever be a rational number

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

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft.what is the area of the stage? enter your answer in the box. ft²

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9