You may mean the 'median' of a series of numbers, instead of the 'average'. Microsoft Excel will crank out those two statistics in no time.
there is no such math term
The math term for multiplication is PRODUCT.
"Subset" IS the math term in this case.
power in a math term is when you multiply the exponents
One math term is y-axis and or yard
There is no such math term. There is, on the other hand, an astronomical term "equinox".
Whole number is a math term. Weighted average is another math term.
Whole number is a math term. Weighted average is another math term.
A math expression is a collection of math terms
This has nothing to do with math.
"Bisect" IS mathematical term!
That is called a variable.