Lydia has 5 bookshelves with a total mass of 856kg and Lisa has 4 bookshelves with a total mass of 994kg what is the difference between the mass of Lydias and Lisa bookshelves Please help thanks

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.

1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0