Adding Polynomial Expressions. (
SIMPLIFY
#1
(ab^2+13b-9)+(6-4a+3ab^2)+(a+7b)< br />
#2
(9x^3-2x^2-x)+(3x)+x^3-4)+(x^2-3x )

He trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? ? a) 42 cm2; 27 cm2; 69 cm 2 b) 54 cm2; 27 cm2; 81 cm 2 c) 108 cm2; 27 cm2; 135 cm 2 d) 108 cm2; 13.5 cm2; 121.5 cm 2