Which fact is not used to prove that pqr is similar to str

The system of equations graphed below has how many solutions?

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?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .