Write the quadratic function f(x) = x2 + 8x + 3 in vertex form.
a) f(x) = (x - 4)2 - 13
b) f(x) = (x - 4)2 + 3
c) f(x) = (x + 4)2 + 3
d) f(x) = (x + 4)2 - 13

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.

X-10/4 when x = –18 a 7 b –2 c –7 d 2

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?