A teacher is arranging desks in a room into rows. Each row has the same number of desks. The teacher has more than one row of desks. Which of these could be the number of desks in the room? Check all that apply. 16 19 23 21 25

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?

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²