Find the 20th term in the following
arithmetic sequence :
12, 15, 18, 21, ..

Abcd is a parallelogram. the diagram is not drawn to scale. if m

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)