Please help on 8 and 9❤️❤️❤️

For which rational expression is -2 an excluded value of x?

Which function has the same domain as y=2x

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.