What is the value of A?

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.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Which of the following equations is equivalent to x/3-6/x=1