Roy had 20 apples. he used 2/5 of them to make pies, how many apples did roy use for the pies

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

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

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)