Which expression has the same value as he one below.8+[4+(-9)]

Can (2,3 and square root 10) be sides ona right triangle?

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?

When you answer this can you explain