Answer:
1. They consist primarily of variables.
2. They are often called formulas.
4. They often describe real-world relationships.
By greater if you mean faster, then you are comparing the fractions 11/10 and 7/6. Finding a common denominator, which is thirty, we get the fractions 33/30 and 35/30. We can see that 35>33, making Song B faster.
Angle 15 and Angle 9 make a straight line
C and D is true and others are false
