The daily high temperatures in Anchorage, Alaska during the week in December were 20, 18, -10, 15, -15, 25, and 11 degrees. The average daily high temperature can be found by adding up all the daily highs and dividing the total by 7.

4. During the week in December in Anchorage, Alaska, the daily high temperatures were 20, 18, -10, 15, -15, 25, and 11. Which expression can be used to find the average daily high temperature during that week?