Two brothers have a combined age of 21 years. Roger is twice as old as Bill was when Roger was as old as Bill is now. How old are they?

The population in a particular country is growing at the rate of 1.9% per year. If 5,092,000 people lived there in 1999, how many will there be in the year 2006? Round to the nearest ten-thousand.

Given two consecutive positive even integers, the square of the smallest added to 4 times the largest is equal to 40. What are the integers?

If a man ran 12mph for 30 minutes, how far did he run?

steven has 1/3 of a package of biscut mix left he will use equal parts of the leftover mix to make three batches of biscuts if he uses all of the mix what fraction of the original package will he use for each batch?

What does it mean to say that a number is a perfect square? Give on example of number that is a perfect square and of one that is not. Explain your examples.

Solve the inequality 4 (x+1) < 2x+3 Show steps

How many solutions does the equation 5x + 10 = 5x - 8 have?

Stan is on a bike ride. His GPS indicates that he has traveled exactly 18 miles and he is 32% complete with his total ride. How many miles long is Stan's ride?

What is the inverse of f (x) = The quantity of three x plus five, over seven.?

The diameter of a sphere is 2 ft. What is the sphere's volume? Round to the nearest tenth.