3.1 Solve each of the following:
a. 3 movie tickets cost $36. At this rate, what is the cost per ticket?
4
A bag contains 120 marbles. Some are red and the rest are black. There are 19 red
marbles for every black marble. How many red marbles are in the bag? Explain your
reasoning

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

(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.)