Find the geometric mean of - 1/10 and - 1/40

Elsa is choosing at random from a bag of colored marbles. The odds in favor of her choosing a green marble are 2:5. What is the probability that she will choose a green marble

A game involves tossing a biased coin that has a 60% probability of landing on heads. If a player wins $50 when heads appears, what is the expected value of a player's winnings?

Janie asked all of her classmates about the number of pets they have in their household. Her findings are shown in the table. A 6-column table with 4 rows. The first column has no label with entries boys, girls, total.

Y=6x-4 y=4x+2 solve using substitution and elimination

Which of the following groups are all recipients of Social Security? Select the best answer from the choices provided. A. all people over age 67 and their spouses B. disabled legal immigrants and their children who are under the age of 18 C.

The time it takes you to get to campus varies inversely as your driving rate. averaging 20 miles per hour in terrible traffic, it takes you 1.25 hrs to get to campus. how long would the trip take averaging 55 miles per hour?

Solve the following word problem. A man travels from Town X to Town Y at an average rate of 60 mph and returns at an average rate of 50 mph. He takes a 1/2 hour longer than he would take if he made the round trip at an average of 55 mph.

A cell splits in half every 15 minutes. How many cells will there be in 150 minutes (2.5 hours) ?

If the height of a cylinder was tripled, but the area of the base remained the same, what would happen to the volume?

Some cell phone users have developed brain cancer. Should all cell phones come with a warning label explaining the danger of using cell phones?""