Real-world examples of the use of prime factorization

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.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?