Harry is half his brother's age. His brother is 28 years younger than their Aunt Jenny, who is five years older than Harry and his brother's dad. their dad is 31 years old. how old is Harry?

Two concentric circles have radii 6 and 14. Find the length of a chord of the larger circle that is tangent to the smaller circle.

Explain how to write and evaluate an algebraic expression. one more than the product of a number and seven decreased by five; evaluate when n=6

A statistics professor wanted to test whether the grades on a statistics test were the same for upper and lower classmen. The professor took a random sample of size 10 from each, conducted a test and found out that the variances are equal.

What is the sales price of a shirt that originally costs $34.99, if it is 25% off?

Today the temperature is 0ﾟC the temperature dropped 12ﾟC from yesterday's temperature what was yesterday's temperature

There are 12 chairs at each table for the annual parents' night dinner. Thirty-two tables are set up. How many people can be seated at these tables?

Round 2.767.545 to the nearest ten

A certain college randomly selected 30 freshman students who completed college algebra during their first semester.

Write 0.214214214 ... as a fraction.

Subtract the polynomials: 2x^2-3xy+4y^2 from 3x^2-5xy-6y^2