Big1400 Big1400
  • 16-09-2018
  • Mathematics
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For the past three months,Grace used her cell phone for 43 minutes 62 minutes and 57 minutes. How many minutes would she have to use her cell phone this month for the average usage over the four months to be 55 minutes

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vokugaw vokugaw
  • 16-09-2018

43+62+57+X=55*4    X is the value for this month

162+X=220

X=58

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