1. 

   math_celebrity Administrator Staff Member

   half the sum of the numbers s, t, and u
   
   The sum of s, t, and u means we add all 3:
   s + t + u
   
   Half the sum means we divide the sum by 2:
   (s + t + u)/2

    

   math_celebrity, Oct 29, 2019

   #1
   
   

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