Solve.A baker can decorate the day's cookie supply four times as fast as his new assistant. If they decorate all the cookies working together in 12 minutes, how long would it take for each of them to decorate the cookies working individually?
A. baker: 60 minutes
assistant: 240 minutes
B. baker: 15 minutes
assistant: 60 minutes
C. baker: 4
minutes
assistant: 17 minutes
D. baker: 60 minutes
assistant: 15 minutes
Answer: B
Mathematics
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?
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?
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for x = 
, y = 
A. 
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