MATH QUESTION I NEED HELP

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

(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.)