Question

The bases of an isosceles trapezoid are represented by 4x and 2x. The height of the trapezoid is represented by (x − 6). Which polynomial expression BEST represents the area of the trapezoid?

A) 3x2 − 18x
B) 3x2 + 18x
C) 3x − 18
D) 6x2 + 36x

Answer 1

Area = (a + b)*h / 2
a = 4x
b = 2x
h = (x -6)

Area = (4x + 2x)*(x - 6) / 2
Area = (6x)(x - 6)/2
Area = 3x(x - 6)
Area = 3x^2 - 18x
A <<<<<<< ===== answer.