Find the value of x and y if (2x + 3y , 2x ) = (20,x +4)

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?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Which value would be a solution for x in the inequality 47-4x< 7