Answer:
false
Step-by-step explanation:
Answer:
60
Step-by-step explanation:

Answer:
The 1st answer that is (0,7) will be No
The 2nd answer that is (3,21) will be Yes
The 3rd answer that is (8,56) will bw Yes
Answer:
- not possible: 1, 2, 4, 5, 8, 11
- possible: all others
Step-by-step explanation:
Obviously, all multiples of 3 and 7 can be paid.
1 cent can be added by adding a 7-cent stamp and taking away two 3-cent stamps. 2 cents can be added by adding three 3-cent stamps and taking away one 7-cent stamp. Hence any value more than 7 +2(3) = 13 cents can always be accommodated.
Amounts that are impossible:
1, 2, 4, 5, 8, 11 cents
All other positive integer amounts are possible.
Answer: its correct
Step-by-step explanation: and its correct cuase its the answer you choose