I believe the answer is -25/6 :)
You would get a total of you count them by pairing them up. The combos are as follows:
For your answer you can count a total
1,5
1,4
1,3
1,2
2,3
2,4
2,5
3,4
3,5
4,5
28.27431 = x + 2
-2 -2
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x = 26.27431 Answered
the pie is 3.14159 x 9 =28.27431
It is increase, because 15 is less than 18. Other way around, if the question is 18 to 15 yards, then that would be decrease, because it is getting smaller.
A measurment of a bench mark is a benchmark or line that indicates numbers