What’s 3x plus 2y plus 4

You can't add all of these together due to the fact that they are different variables. It is like trying to add pears and apples and saying them in one word. You can't do it.

Step-by-step explanation:

i think the answer is b.

step-by-step explanation:

not 100% sure though.

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.