If Amy has two apples and drops one, how many does she have now?

What expression is equivalent to 42x-56y

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

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?