Colors of Marbles in a Bag: Red 8, Blue 10, Green 22, Total= 40. The table shows the number of different colors of marbles in a bag. If a marble is chosen at random from the bag, what is the probability that the marble will be blue?

The average weight of a blue whale is 125 tons. What is the average weight of a blue whale in pounds? (1 ton = 2,000 pounds)

A large tank is filled with water at a rate of 70 cubic feet per hour. If it takes 9 hours to fill the tank, which of the following is closest to the volume, in cubic feet, of the water in the tank?

A city has 50 city council members. A reporter polled a random sample of 20 city council members and found that 6 of those polled supported a specific bill. Based on the sample, which of the following is the best estimate of the number of city counci

x + y = 20 2(x+7) + 37 = 85 If (x,y) is the solution to the given system of equations, what is the value of y?

Owen has already read 200 pages of a book that has y pages. On average, Owen reads about 40 pages per hour. If it will take Owen x hours to read the remaining pages of the book at this rate, which of the following equations models the relationship be

Of the 8 planets in our solar system, 4 are considered rocky. If a student randomly selects 1 of those 8 planets as a topic for a report, what is the probability that the selected planet will be rocky?

The density of the metal platinum is approximately 21.46 grams per cubic centimeter . What is the approximate mass, in grams, of a bar of platinum with a volume of 100 cubed centimeters ? (Density = mass/volume)

Data set A: 72, 73, 73, 76,76 Data set B: 61, 64, 74, 85, x Data set A and data set B each contain 5 numbers. If the mean of data set A is equal to the mean of data set B, what is the value of x ?

The number of countries in each continent in 2014 is as follows. Africa 54, Asia 44, Europe 47, North America 23, Oceania and Australia 14, South America 12. What percentage, to the nearest tenth, of the countries is in N. America?

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