The shaded region outside the small square but inside the large rectangle models the grass in Shannon’s back yard. A rectangle has a width of 7 x minus 5 and height of 4 x. A smaller box is inside of the rectangle with side lengths of x. If the dimensions given are measures in feet, which expression represents the area of the shaded region? 27 x squared minus 20 x 18 x squared minus 15 x 20 x minus 27 x squared 15 x minus 18 x squared.

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?