SOLUTION: Anthony's company made 17 customer calls last week and 22 calls this week. How many calls must be made next week in order to maintain an average of at least 20 for the three-week p

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Question 276561: Anthony's company made 17 customer calls last week and 22 calls this week. How many calls must be made next week in order to maintain an average of at least 20 for the three-week period?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
(17+22+x)/3=20
17+22+x=60
39+x=60
x=21
x must be at least 21 calls