The answer is no solution
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Area of the trapezium = 1/2(18 + 6) x 12
Area of the trapezium = 144 in²
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Answer: Area = 144 in²
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Daily __ 17.50d + 3.50d=C
Seasonal __ 125+3.50d=C
D= the number of days they went and C =the total cost of the trip