Sam and Rachel both walk dogs in their neighborhood. Sam charges $15 per walk, plus an hourly rate of $6.50. Rachel does not charge an initial fee, but charges $12 per hour.
Write an expression to represent how many hours they spend with one dog to make the
same amount of money.

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?