Which equation can be rewriten as x+4=x^2? assume x>0

Show me how you find x and determine what x is you i appreciate it : )

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.

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?