Aconcession stand sells hamburgers. the revenue from hamburgers is (30x + 45) dollars.
the price of a hamburger is $5. write an expression that represents the number of hamburgers sold.

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

If the value of cos330°is√3/2 then find cos 165°.

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2