1 more after this apperently

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

Which is the completely factored from of xy^3-x^3y

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)