8. 15x - 10 = 80
a. X= 2
b. x=4
c. X= 6

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

(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.)

What are the triple angle formulas? is it related to double angle identities?