Help Fast Plzzz The sum of two numbers is 39. The second number is 3 more than three times the first number. Let x represent the
first number and let y represent the second number. What is the value of the first number?
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16 more than the product of 5 and p

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.