10. Which is a subset of whole numbers?
A rational
B. irrational
Creal
D. natural

The answer is D. Natural

Step-by-step explanation:

A subset, mathematically, means a category within another set. This can be shown from the picture below.

As you can see, the subset of whole numbers is, in fact, natural numbers.

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function

his answer is incorrect. i just used it, and it said it was incorrect. the answer is 0.