Five teachers were hired at oakdale middle school at the beginning of the 2005 school year. the performance of each teacher was rated by the principal at the conclusion of each school year. the performance ratings are charted below. use this information to answer the question.

which teacher exhibited the most variable year-to-year performance over this 5 year span?

jill

ed

ralph

sam

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Which function has the domain x> -11?