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  • 4 years ago

The Hydro water department has a monthly service charge of $13.50 and a volume charge of $2.01 for every 100 cubic feet of water. The total monthly cost is equal to the service charge plus the charge for the volume used during the month. If we let x represent the number of cubic feet of water (in hundreds) and y represent the total monthly cost, then we have: total monthly cost = volume charge + service charge y = 2.01x + 13.50 If the Johnson family used 300 ft3 less water this month than last month, then they can expect

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  1. A_clan
    • 4 years ago
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    y2=2.01x2 + 13.50 y1=2.01x1 + 13.50 x2-x1=300

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