Have you ever wondered how two completely different subjects tend to interchange with each other? I was approached with this train of thought by my Algebra 2 teacher; "How does your school cluster have anything to do with math?"
I started to think in terms of music. I definitely have to count my measures to make sure I am in the right place. I also have to keep rhythm... and time!! That's it! The time signature at the beginning of every piece is a fraction! 
Ex. This picture shows the time signature 4/4 or in some cases, C. This means that there are 4 quarter notes counted equally for each measure. This time signature is most commonly used.
Ex.This picture to the right shows a time signature refered to as 3/4 time. This means that there are 3quarter notes per measure. This time signature is commonly used for Waltz's.
Ex. This picture to the left is a fantastic example of 6/8 time. On the first row, it shows that 6/8 is made up of 6 eighth notes in each measure. Below the first line, the piture shows how these no can be shown in greater lengths by substituting 3 eighth notes by a dotted quarter note, which has the same amount of time as the 3 eighth notes, but is written for change in pattern. All of these levels hold an equal amount of time in each measure.
These examples could go on and on because of how many time signatures there are. With this, I have realized the connection between math and music. Without math, composers wouldn't be ablee to compose music in an orderly way. And for some, like myself, we can't accomplish math homework without music!
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