# Math

A car rental agency charges ​\$35
per day to rent a car and ​\$14.95
per day for a global positioning system​ (GPS). Customers are charged for their full tank of gas at ​\$3.40
per gallon. A car has a 19
gallon tank and a GPS.
a) Write a function rule for the total bill b as a function of the days d the car is rented.
​b) What is the bill for a 9 day​ rental?

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2. 👎
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1. What's the trouble? Just write down what they told you:

b = 3.40*19 + (35.00+14.95)d

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2. 👎
2. Assuming that the person has to completely refill an empty tank:

35d + 19.95d + 19*3.40 = b

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2. 👎

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