An education researcher randomly selected 48 middle schools from across the country and interviews every teacher of the selected schools. Which sampling method did he use?

The radius of a circular hat is 3.7 inches. Find the circumference.

Adam and Darius provide the following proofs for vertical angles to be equal

How do i get y separated from 3y - 6 = 9 + 12x

Suppose you have just enough money, in coins, to pay for a gallon of milk priced at $2.40. You have 12 coins, all quarters and dimes. Let q equal the number of quarters and d equal the number of dimes. Which system models the given information?

An email spam reaches three readers. Each of them forwarded the same email to three different readers.

True or false? The degree of a binomial is always equal to 2

Given two-digit numbers 10, 13,16, 17 and 20. How many remaining two-digit numbers smaller than 22?

What is the nearest ten thousand, the population of Vermont was estimated to be about 620,000 in 2008. What might have been the exact population of Vermont in 2008

What can 23/40 be simplified into

What is the length of a cube has a volume of 0.2l6 ft^3