Three ventilation fans, each working alone, can clear the smoke out of a room in 12 hours, 16 hours, and 24 hours respectively. How long would it take to clear out the smoke in the room if all three fans are used?

5 times plus y = 9 10 times subtract 7y = 18

Julian saved between $ 30 and $ 52 over the summer. His friend Daniela saved twice as much. Let n represent the amount of money Julian saved. Write and solve an inequality to represent the amount of money Daniela saved.

To get the purple I need I mix 1/3 cups of blue and 1/2 cups of blue. How many cups of blue and red do I need to get 20 cups of purple

Evaluate tan60degrees over cos45degrees

I know the answer but my teacher told me how and why but i dont know so can some one tell me how and why There are two sizes of milk to choose from at the grocery store. A 3-quart carton cost $ 2.78 while a 4-quart carton cost 3.

A monarchy has one leader. how many terms do you think a monomial has?

May wants to buy a $50,000,000 car. For every week, she pays 5% until she pays off the price. How many weeks would she need until she pays the total of $50,000,000?

The population of the United States is 3 * 10^8 people, and the population of the world is 6.9 * 10^9 people. How many times larger is the world population? Write your answer in standard notation.

Which of the numbers are divisible by 9 119 702 432 641 372

A restaurant used 8 5/6 pounds of rice on Monday and 5 1/6 pounds of rice on Tuesday. How many more poundsof rice was used on Monday than on Tuesday?