It depends on the context.
The most likely context is that of a range for a set of data and a range of 9 means that the biggest minus the smallest = 9
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The range of a data set is the difference between the last and greater value subtract..Example:9,8,7,6,5,4Since 9 is bigger and the 4 is the smallestsubtract 9 and 4 = answer
9.
2, which equals 54. 3, which equals 36. 4, which equals 27. 6, which equals 18. 9, which equals 12. 12, which equals 9.
9 feet equals 3 yards.
12 plus 9 equals 21.