Please could anyone help me with answering this question? I would be so grateful for any help

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.

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?

10% of 1,900,000. show me how you got the answer