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Licemer1 [7]
3 years ago
7

A plumber charges $50 to come to a house and $20 an hour for work time.

Mathematics
1 answer:
PolarNik [594]3 years ago
6 0
Since the 50 remains the same every time, is has no letters next to it in the equation.  The 20, however, is multiplied by the amount of hours, and will therefore have an h next to.  

20h + 50- the answer is a. 
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