Under what circumstances would this statement be true (∀z)(∀y)[(G(z) & W(y)) → E(y, z)]] Check all that apply. Question 18 options: If there are no wolfs. If there is a wolf who has eaten every goat. If every goat was eaten by a wolf. If there are no goats.

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

actually what is a question i don't understand

it is rigid.; it is isometric. ; the size is preserved.

step-by-step explanation:

a translation is called an isometry; these are transformations that preserve congruence between pre-images and images.

they are also called rigid transformations, as the only thing that can happen to a pre-image is that it is moved or turned, not stretched or shrunk.

since congruence is preserved, the size is preserved.