Yes and they are between two parallel lines.
Hades' alternate names mean 'the unseen one' and 'the rich one'.
A expression in maths is a collection of terms without an equality sign.
It depends on what you mean by alternate. If you mean what I think you mean, then, for example, you could substitute (or sometimes called alternate) 1 cup milk with 1/2 tsp. lemon juice if you didn't have buttermilk. Otherwise, I have no clue what you mean.
"tenth"
What symbol
division
circle
direction
Related to.
Adding
The mean is usually the arithmetic mean - there are other means in maths. For a set of numbers, the arithmetic mean is the sum of the numbers divided by the number of numbers.