How to you get the mean in math

A man buys an article for $27.50 and sell it for $28.60 find the gain percentage

Is 21 a prine number or a compositr number?

M divided by 6 equals 21 What would be a reasonable estimate for the value of m in this equation A - 5 B - 100 C - 200 D - 50

Solve the Integral of 1 / (1-y2)

It is currently 0 degrees outside, and the temperature is dropping 4 degrees every hour. The temperature after h hours is - 4h. It can be described with the equation - 4h=-14. What value of h makes the equation true?

The product (k-9) ^2 can also be written as

Consider the system of linear equations 2y equals x + 10 3 y equals 3x + 15which statement about the system are true

27 less than twice a number is negative 1

Which function below represents exponential decay?ƒ (x) = 0.5 (2) xƒ (x) = 4 (0.25) xƒ (x) = 2 (1.3) xƒ (x) = (-3) x

What is the answer to x=4