Answer:
Christopher practiced 3 ore hors
Step-by-step explanation:
780/60 = 13 hours so Christopher practice 3 hours more
Answer: 7
Step-by-step explanation: The only pattern in this sequence that I can see is addition by 4. Therefore, the 3rd term is 15, the 2nd is 11, the 1st is 7.
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Answer: c
x = 18