Which geometric instrument would i use to measure the length of a segment, the compass or the straightedge?

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?

One integer is 5 more than another. their product is 104. find the integers

3x + 4y = 5 x- 3y = -7 solve by substitution