Correct the subtraction. (11x-1.7)-(18x+6.5)=11x-1.7-18x+6.5
=-7x+4.8

(11x-1.7)-(18x+6.5)=?
​(Simplify your answer. Use integers or decimals for any numbers in the​ expression.)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

(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.)

Find the distance between the pair of points a(-1,8) and b(-8,4)