A custodian can clean 2 classrooms in 12 minutes. At this rate, how many classrooms can a custodian clean in 1 hour?
1 answer:
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Answer:
Option C
Step-by-step explanation:
<u><em>Verify each expression</em></u>
case A) we have
In this expression the term of n is 6n
so
has a coefficient of positive 6
case B) we have
In this expression the term of n is -5n
so
has a coefficient of negative 5
case C) we have
In this expression the term of n is n
so
has a coefficient of positive 1
case D) we have
In this expression the term of n is -n
so
has a coefficient of negative 1