Joe's electric made 15 customer calls last week and 21 calls this week. how many calls must be made next week in order to maintain an average of at least 20 calls per week for the three week period?

Ihonestly don’t understand this at all

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here