Ineed to follow the order of expressions to solve the expression

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

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

Plz ( true - false) all triangles have interior angles whose measure sum to 90.