Which expression can be simplified to find the slope of the trend line in the scatterplot? On a graph, a trend line goes through points (2, 87) and (8, 78).

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

If value of cos330° is √3/2 then find tan165°.

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)