Find the inequality √x -1≤x-1​

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

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?

Can you divide 25 into 4 equal groups? explain why or why not.