Whats the sum of 4 consecutive odd integers is 4 less than 100. what is the second largest integer?

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Iam so stuck. what is the worked out answer for this question?

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