Given:
Schaum's earnings in a month = 
His wife's earnings in a month = 
Where x is the number of working days in a month.
To find:
The total earnings in a month.
Solution:
We know that,
Total earnings = Schaum earnings + His wife's earnings in a month



Therefore, the correct option is A.
in hours there would be 156 minutes
Step-by-step explanation:
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Answer:
43% or 3/7
Explanation: Subtract 16 from 28 to get the number of muffins with no blueberries. Then you get 12/28 which is simplified to 3/7 or 43 percent.