Tammy wants to get change for $.30. the only coins she can get are quarters, nickels and dimes. how many different ways can she get $.30 using only these coins?

Country carpets charges $22 per square yard for carpeting, and an additional installation fee of $100. city carpets charges $25 per square yard for the same carpeting, and an additional installation fee of $70

What is the smallest integer n such that n\sqrt{2} is greater than 20

How do i simply this radical expression?