This year, 40 students have each travelled by one or more of plane (P), train (T) or boat (B). 7 have travelled only by plane. 11 have travelled only by train. 9 have travelled only by boat. n( P+T)= 8 n (B+T) = 3 n( B+T) = 6. (the plus represents “intersection” symbol) Please help

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation:

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.

there were a lot of them but the first one to pop up on a google search was bts