A pool can be filled by one pipe in 4 hours and by a second pipe in 12 hours. How long will it take using both pipes to fill the pool?

Four girls and eight boys are running for president or Vice President of the student council. Find the probability that the two boys are elected.

The amount of methane emissions, in millions of metric tons, from 2002 to 2008 is shown. Find a regression model that best models the data. The function that best models the data is. Use the model to complete the statements.

Which is a simplified form of the expression 5c - 7 (2c - 4) ? A. 9c + 28 B. - 9c + 28 C. 9c - 28 D. - 9c - 28

In Denver Colorado the temperature changed from 30c to - 27c in 3 hours. The change in the temperature was the same amount each hour. how much did the temperature change and how?

Josephine was asked to make a one-fiftieth scale model of the new water tower for her town. She constructed the model that is shown below. The height is 2.25ft and 1.

Are (3x + 1) (x + 2) and 3x2 + 7x + 2 equivalent?

In a cylinder, r=7 and surface area s=210pi. Find the volume of the cylinder.

Carleis cutting pieces of string that are excatly 24 3/8 inches long how many pieces can she cut from a ball of string that has 100 feet

Your friend gives you $50 to gamble at a casino and you win 100,000 jow much did you give them

Find the 39th term of the arithmetic sequence that starts with 4 and has a common difference of 6. A. 232 B. 226 C. 238 D. None of these