The temperature dropped -4° f on monday, -5° f on tuesday, and -3° f on wednesday. which equation correctly shows how to find the average drop in temperature for all three days? (-4) + (-5) + (-3) = 12 12 ÷ 3 = 4 (-4) + (-5) + (-3) = -12 -12 ÷ 3 = -4 (-4) + (-5) + (-3) = 12 12 ÷ -3 = -4 (-4) + (-5) + (-3) = -12 -12 ÷ -3 = 4

There are actually two equations involved. One to find the sum of the temperature changes; the other to compute the average from that sum. The average is computed by dividing the sum by the number of terms (3). The number of terms is a count of obects, so will not be negative.

The appropriate choice is ...
  (-4) + (-5) + (-3) = -12   -12 ÷ 3 = -4