A real estate agent estimates that the value of a house will increase by about 4.5% each year. If the house was valued at $200,000 in 2015, what will its value be in 2025?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Which expression is the factorization of x^2+10+21