Suppose n(u) = w, n(a) = x, n(b) = y, and n(a ∪ b) = z. (a) why must x be less than or equal to z? a ⊆ (a ∪ b) (a ∪ b) ⊆ a        (a ∪ b) ⊆ b a ⊆ (a ∩ b) (a ∩ b) ⊆ a

First, note some definitions:

1. A set is a collection of distinct objects, considered as an object in its own right.

2. If A is a set, then n(A) is a number of elements in A.

3. Set X is a subset of a set Y if and only if every object of X is also an object of Y. Here use notation X⊆Y.

4. A set X∪Y is called union of sets X and Y. This is the set of all distinct elements that are in X or Y.

Now remember that

Then n(A)≤n(A∪B) (or x≤z), because A ⊆ (A ∪ B).

idk

step-by-step explanation:

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: