Sue and kathy bring your algebra homework again. they were asked to write the equation of the line the passes through the points (1, 4) and (5,0). sue wrote y-4=-1(x-4) and kathy wrote y=x+5. determine which student is correct, and explain why the other student is incorrect

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

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

Which expression gives the exact value of x?