The mean age of 5 people in a room is 40 years.

A person enters the room.

The mean age is now 37.

What is the age of the person who entered the room?

Working together, it takes two different sized hoses 30 minutes to fill a small swimming pool. If it takes 45 minutes for the larger hose to fill the swimming pool by itself, how long will it take the smaller hose to fill the pool on its own?

Find the volume for a can of corn with a diameter of 3 inches and a height of 6 inches:

A bag contains 6 red jelly beans, 4 green jelly beans, and 4 blue jelly beans. If we choose a jelly bean, then another jelly bean without putting the first one back in the bag, what is the probability that the first jelly bean will be green and the

I need to convert 637miles into kilometers but I can't remember how to.

Joe Has an 8 foot long board. He needs to cut it into 9 equal length parts. How many feet long should each section of the board be?

A box is 20 cm long. Which of these is closest to the length of this box in feet? (1 inch = 2.54 cm)

While shopping, you see a jacket marked down 20%. If the original price of the jacket is $175, what is the sale price of the jacket

Subtract the sum of - 11ab and - 23ab from the sum of - 19ab and 7ab

Which expression is equivalent to the given expression? 3 (2a + 5) ?

Suppose Eva has 12 3/4 pounds of flour. The day's baking will require that amount. How much flour will Eva need?