What is rhe vertex of this parabola ? HELP

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?

Evaluate the expression. (9 + 5)(3 + 2)0

Aline passes through 3,7 and 6,9 what equation represents the line