Help much needed :(

Area of triangle = 1/2 bh

60 = 1/2 (15) h

8 = h

Quadrilateral area = h x (b1 + b2)/2 = 8 x (15+9)/2 =  96 sq units

96 -60 = triangle BAD area = 36 sq units   (fixed typo)

Thank you!  You make a mistake though, the answer should be 36 not 30.