Question Help The selling price of an item is $550. It is marked down by 20%, but this sale price is
still marked up from the cost of $400. Find the markup from cost to sale price.

please please help :( will mark brainlest !

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: 3.26019516

step-by-step explanation: