Simplify each expression. 1) (6p - 3p+6) + (6 +8p? + 2p?) 2) (6v- 7 + 3v?) - (2-12 + 8v") 3) (8p+ - 6p + 5p) -(2p+ 5p? + 7p) 4) (6a? - 80 - a^)+ (2a + 2a - 3a)

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.