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larenhemmings
24.05.2020 •
Mathematics
A long-stay parking lot charges an intimo fee of $10, plus $2 for each day the car is parked. How many days must the car be parked for the average cost per day to fall to $4
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Ответ:
The car must be parked there for 5 days
Step-by-step explanation:
Let the number of days be x
For x days, the amount paid would be 10 + 2(x ) = 10 + 2x
now this amount is equal to an average value of $4 per day for same x days. Using the average , the amount of money paid will be $4x
Now since these two values are equal, we equate them
10 + 2x = 4x
10 = 4x - 2x
2x = 10
x = 10/2 = 5 days
Ответ: