Which is true of the slopes of parallel lines? a)they are equal. b)they are opposites. c)they are additive inverses. d)the are opposite reciprocals.

They have equal slopes.

Its A

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

answer is

b.

11

hope you get this one right.