3. show your work to find the mean and standard deviation of the data. round to the nearest tenth.
20, 16, 18, 14, 9, 20, 16

The reflexive property of congruence lets you say that ∠pqr ≅

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?