(1 point) Which of the following expressions are equivalent to (2 + y)2? There may be more than one correct answer.
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A. (x+y)(x+y)
B. x2 + y2
c. (y + x)2
D. 2(x + y) + y(x+y)
E. (x – y)2

When only separate discreet points are graphed it is called?

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)

Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below. the design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to construct a 99% confidence interval estimate of μ, the mean duration of game play. 4028 4316 4816 4650 4036 5010 4833 4331 4307