Find the value of 3x+2 when 7+ x =5 me

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

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Can some one me with these questions