DG's Plumbing and Heating charges $50 plus $75 per hour for emergency service. Bill remembers being billed just over $300 for an emergency call. How long to the nearest hour was the plumber at Bill's house?

3.33 hours

Step-by-step explanation:

Take the total bill minus the flat charge. ($300 - $50 = $250)

Then take that amount and divide by the charge per hour.

($250/$75) = 3.33 hours

x = 3 1/3 so approximately 3 hrs

Step-by-step explanation:

50 + 75x = 300

75x = 250

x = 3 1/3

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