A box contains 8 red and 5 green marbles. Two marbles are randomly selected from the box, without replacement, and without regard to order. What is the expected number of red marbles?

How many pounds is a quarter ton?

A culture started with 6,000 bacteria. After 5 hours, it grew to 7,800 bacteria. Predict how many bacteria will be present after 13 hours. Round your answer to the nearest whole number.

What is the greatest common factor (GCF) of 56 and 80?

How do you create and solve equations in one variable given a real-world situation?

Suppose a 7-player kabaddi team is practicing. If the raider is chosen randomly for each raid, what is the probability that the same player will be chosen for three consecutive raids? Round your answer to the nearest hundredth of a percent. a. 14.

Suppose that you have a pattern rule with an algebraic expression. a) What does the constant term tell you about the pattern? b) What does the numerical coefficient tell you about the pattern?

Is the function f (x) = ( - 7) ^ x an exponential function? If so, identify the base. If not, why not?

What two numbers multiply to get - 294 and add to get 7

What is the common difference for this arithmetic sequence 45,40,35,30,25, ...

It takes 40 units of maple sap to produce one unit of maple syrup. Jane and her family are bottling maple syrup in 20 oz. bottles. She notices that they add about 2 oz. of air every time they fill a bottle, to avoid overfill.