What is the relationship among m∠BCD, m∠ A, and m∠B in the figure below?

40 °+75 °=m ∠ BCD

40 °+75 °=180°−m ∠ BCD

40 °−75 °=m ∠ BCD

40 °−75 °+m ∠ BCD=180°

Can you answer my question? will mark brainiest!

Solve the formula ax+ by = c for x.

(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.)