Answer:
3y
Step-by-step explanation:
A^2 - b^2 = (a-b)(a+b)
To test it, expand the right hand side.
The sum of the first n natural numbers and 0=
n*(n+1)/2
Answer:
15 miles
Step-by-step explanation:
12 + ( 1/4 x 12) = ?
12 + 3 = 15
The mean is usually the best measure of central tendency to use when your data distribution is continuous and symmetrical, such as when your data is normally distributed. However, it all depends on what you are trying to show from your data.