Combining oxygen with hydrogen in a fuel cell produces water and energy that can power a car. how many grams of hydrogen must be added to 800 g of oxygen to produce 900 g of water?

Alice has 1/5 as many miniature cars as Sylvester Sylvester has 35 miniature cars does Alice have

8/n = 33/45 what is n value

The number of visits to public libraries increased from 1.2 billion in 1999 to 1.6 in 2004. Find the average rate of change in the number of public library visits from 1999 to 2004

Mr. R comments on a test, "well, the class average on that test is exactly 83. if I take away the best score, the average is exactly 82." if there are 16 students in the class, what is the best score?

What is a solution to (x + 6) (x + 2) = 60? x = - 6 x = - 4 x = 4 х = 12

A car and a motorcycle leave at noon from the same location, heading in the same direction. The average speed of the car is 30 mph slower than twice the speed of the motorcycle. In two hours, the car is 20 miles ahead of the motorcycle.

The product of two factors is 72. One of The factors is 8. What is the other factor

Write 5 22/25 as a decimal.

Building a is 160 feet shorter than building b. the total height of the two buildings is 1530 feet. find the height of each building.

Find the area of the figure. If you need to use pi in your computation, approximate its value as 3.14. Round to the nearest hundredth. Rectangle topped by a semicircle height is 5in base is 4 in