SOLUTION: Joe's electric made 16 customer calls last week and 25 calls this week. How many calls must be made next week in order to maintain an average of at least 20 calls for the week pero

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Question 176838: Joe's electric made 16 customer calls last week and 25 calls this week. How many calls must be made next week in order to maintain an average of at least 20 calls for the week peroid?
at least ________ calls must be made to maintain an average of 20 calls.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
Let x be the number of calls to be made next week. The average for the three week period would then be %2816+%2B+25+%2B+x%29%2F3+=+20. Just solve for x.