Na multiplicação abaixo, cada letra representa um algarismo do sistema decimal de numeração. ABC x 9 7DC6 O valor de A + B + C + D é: A: 22 B: 20 C: 24 D: 21 E: 23

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

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

If bradley saves for 4 weeks, what is the total amount of money he will have saved?