In Exercises 9 and 10, point B is between A and Con AC. Use the information to write an equation in terms of x. Then solve the equation and find AB, BC, and AC.
9. AB = 13 + 2x
10. AB = 8x + 5-6
BC = 12
BC = 5x – 9-53
AC = x + 32
AC = 74 - 21

Plz which expression is equivalent to the expression below?

Given that abcd is a rhombus, what is the value of 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.)