Christy purchased an art easel at a garage sale for $30. She later sold the easel on Craigslist for $45. What was the percent increase of the price of the easel?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

State one method by which you can recognize a perfect square trinomial.