X^3 - 3mx^2 + 3(2m - 1)+1

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

Math it's appreciated. (picture provided)

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school