In the following variable expression, identify the terms that are similar to 2x.2xy + 7x- 2 + 4y + 9x

How is bias determined?

A) Calculate the difference from any outlier data points to the mean. B) Compare the average result from several dozen samples to known referent values. C) Plot the results of several dozen samples as a standard curve and compare them to the referent values provided by the manufacturer. D) Subtract the mean result from the reference method from the mean result of the new method.

You are dispatched to a residence at 2:00 AM for an elderly man with shortness of breath. The patient tells you that he was suddenly awakened with the feeling that he was smothering. You note dried blood on his lips. The patient tells you that he has some type of "breathing problem," for which he uses a prescribed inhaler and takes a "heart pill." You should suspect:

A) right ventricular failure. B) reactive airway disease. C) acute COPD exacerbation. D) left-sided heart failure.