Factor this expression completely
18xy - 9wy - 12y

A. 3y(6x-3w-4)

B. 3(6xy-3wy-4y)

C. -3y(-6x+3w+4)

D. 9y(2x-3w-12)

3y(6x-3w-4)

Step-by-step explanation:

18xy - 9wy - 12y

18xy = 3*3*2*x*y

9wy = 3*3*w*y

12y = 3*2*2*y

We can factor out a 3 and a y

3*3*2*x*y - 3*3*w*y - 3*2*2*y

3y(3*2*x - 3*w - 2*2)

3y(6x-3w-4)

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

step-by-step explanation:

in which figure is point g a centroid