Deborah playlist on her mp3 player had a variety of songs on it. She had 21 country songs, 18 alternative songs, 16 pop songs, and 18 rock songs. Use the bar diagram to write and evaluate two numerical expressions to represent the total number of songs on Deborah mp3 player. 21 songs. 18alternative songs. 16 pop songs. 18 rock songs. Write and evaluate an expression using only addition