What is a "null hypothesis"?

Least to greastest: 3/4, 0.8, - 1, 2/5,.65?

4^2/4^-7 as a single positive exponent

The sum of 3, 5, and a number is 15. Why is the value of that number?

On June 15, Paradise Park purchased merchandise for the racetrack. The invoice was for $4,500, terms 2/10, n/30. On June 20, Paradise Park returned $200 of merchandise for credit. On June 25, it paid the amount owed.

A plastic circular cone with a volume of x cubic centimeters is sliced horizontally into two shapes. If the height and radius of the smaller cone is half the height and radius of the original cone, which expression represents the volume of the other

Jan and Laura have a total of 3 same sized cookies they want to divide equally between the two of them. What fraction of the cookies should each girl receive?

Factor. x2+5x-14 polynomials and binomials

What number has factors of 2 and 3 and multiples of 12 and 18

Lily goes car shopping and finds two cars. The first one burns fossil fuel, gasoline, that sells for $18,000. It will cost $100 each month to buy fuel and maintain this car.

3 x + 2y equals negative 2