Answer:
Step-by-step explanation:
Each number has initially 10 options.
If one option used for the first number then the second number has one less, 9 options. Similarly, the third number has one less number of options than the second number, 8 options.
Total number of combinations is
Answer:
33
Step-by-step explanation:
33= 11 * 3
99= 11 * 3 * 3
Answer: x+4 = 12
Step-by-step explanation:
Answer: The consumer saves $45
Step-by-step explanation:
If you multiply 20 by 3 you get 60 then you multiply by .75 and you get 45