Two lines, a and b, are represented by the following equations:

line a: 2x + 2y = 8
line b: x + y = 3

which statement is true about the solution to the set of equations?
a it is (1, 2).
b there are infinitely many solutions.
c it is (2, 2).
d there is no solution.

(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.)