Algebraic Expression: Last month Lenore sent 16 more text messages than her sister Kayla, Write an algebraic expression for the number of text messages Kayla sent last month.

Why did you use 0+h?

You are buying balloons for a party. A small balloon cost three dollars. A large balloon cost four dollars. Write an algebraic expression for the cost of X small balloons and Y large balloons. Then find the total cost for 14 small balloons and seven large balloons.

Band class is 60 minutes long. Each band member is also expected to practice at home. The expression 60 + h shows total minutes spent playing each day, where h represents minutes of practice at home. When French horn players Jack, Lu, and Richard evaluate the expression, Lu and Richard get the same value, but Jack gets a lesser value. Explain how this is possible.