Hold on just have to type before I can see the question
The graph is in the picture (0,8) (40,0)
Cross multiplying:-
18*x = 12*30
x = 360 / 18
x = 20 answer
Well, the area of a trapezoid is A = (

+

) * h * 1/2 so you can use the area of a parallelogram, which is A = l * w, by splitting the trapezoid into 2 triangles and one rectangle. So you'd use A = l * w for the rectangle and A = 1/2bh for the triangles. You'd get the same answer!