Seudónimo Seudónimo
  • 12-01-2017
  • Mathematics
contestada

the average of 4 number is 85. if three of the numbers are 76, 78, and 81 what is the fourth number.

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royalranger
royalranger royalranger
  • 12-01-2017
[ ( x + 76 + 78 + 81 )/4 ] = 85

x + 235 = 340

x = 105
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