Do u have to reverse the inequality symbol each time and it you multiply or divide to solve?

only if the denominator(the number you're going to divide it with) is negative for example : 5÷-3. Note : it only works in division

what are you trying to solve here

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.