How can we remove negative tiles when the collection has only positive tiles?

Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld

Drag statements and reasons to each row to show why the slope of the line between d and e is the same as the slope between e and f, given that triangles a and b are similar.

What is the slope of the line? a. -5/2 b.2/5 c. 5/2 d.7/2