Help i can solve it but i dont get it

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

(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.)

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation.