John has a baseball card collection that is worth $280.00. He has 64 baseball cards from 1988. Each of the 1988 cards is worth $2.30. He also has a set of 30 baseball cards from
1983. Each of the 1983 cards are worth the same amount.
a) Write an equation to model this situation. Be sure to define your variables.
b) What is the value of each baseball card from
1983?

With this one. will mark brainliest

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

That table shows measurements (in invhes$ from cubes with different side lengths. which pairs of variables have a linear relationship? check all that apply