Answer:
Yes repetition is permitting in permutations/combinations. It depends on the problem. For example a password being "555" is allowed. But in a race, racers logically can not repeat.
Step-by-step explanation:
About 30
The value 239.63 rounds to 240
The value 7.51 rounds to 8
Divide 240 over 8 and we get 240/8 = 30
75
5x-9+9x-6=111
14x-15=111
14x= 126
x=9
-6+9(9)= 75
