Acircle has the equation x^2−8y−6x+y^2=4.

a: what value should be added to each side of the equation to complete the square for the x's?

b: what value should be added to each side of the equation to complete the square for the y's?

c: what is the standard form of the equation?

select three answer choices: one for question a, one for question b, and one for question c.

a: 3
b: 4
c: (x−3)2+(y−4)2=29
a: 36
b: 16
c: (x−3)2+(y−4)2=16
a: 9
c: (x−3)2+(y−4)2=25
b: 64

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?