Two people brought in 4714.4. one person brought in 810.5 more. how much did each person bring in

What is the missing step in this proof ?

(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.)

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question