Describe an unknown or changeable quantity

Solve the equation for n, the number of molecules. PV=nRT

Find the area of a circle given the diameter of 12

A correct translation of "six less than twice the value of x" is

Galena is going to make x pies. She will put 3 pounds of berries in each one. Which equation can be used to find b, the total number of pounds of berries she will put in the pies?

You have two unmarked containers, a 9-liter container and a 4-liter container, and an unlimited supply of water. Explain how you would get an exact measurement of 3-liters with the given equipment.

The sum of three consecutive odd integers is less than 100. What are the greatest possible values of these integers.

A 17-foot pole is leaning against a wall. The bottom of the pole is 8 feet away from the bottom of the wall. Approximately how high up the wall does the top of the pole reach? 8 feet 9 feet 12 feet 15 feet

Dmitri wants to cover the top and sides of the box shown with glass tiles that are 5mm square. How many tiles does he need? (The length is 15cm, the width is 20cm and the height is 9cm).

3 1/2 * 8 2/3 = Answer and Explain

Mona counted a total of 56 ducks on the pond in Town Park. The ratio of female ducks to male ducks that Mona counted was 5:3. What was the total number of female ducks Mona counted on the pond?