Urgent !

what is the equation of the trend line?
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k = [__] j + [__]

What expression is equivalent to (2x-1)(x-3)?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Sketch one cycle if the cosine function y=2cos2theta