Solving One-Step Equations Solve the equation and check your answer. +1 6 = 1 2 4 Which statements are correct? Check all that apply. To undo what has been done to the variable, add 1 1- to both sides of the equation. 4 11 11 경 To undo what has been done to the variable, subtract from both sides of the equatic 1 n=5 4 n=7 73 3 4 1 Check the answer by substituting 5 for the variable in the original equation. 4 ) Intro​

(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.)