exam Maths Puzzle Numerical Ability

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9. (10 pts) In a survey of 75 resorts, it was reported that:
34 provided refrigerators in the guest rooms
30 provided laundry services

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exam Other Question

Write equations for the vertical and the horizontal lines passing through the point (2,7) in (x,y) -coordinates. if x=-1 and y=2,what is the value of the expression 2x^3-3xy?