F(x) = 0.5x -6 evaluate f (3) =

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here

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.