The perimeter of a rectangle is 54cm. one side is x cm and the other side is 6cm longer. form an equation involving x . solve the equation and write down the length of each of the sides

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?