exam Maths Puzzle Numerical Ability

|2y-6|=-9

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Could you help me solve this px

2. (2 pts) Express the following in set builder notation:
Z = {2, 3, 4, 5, 6, 7, 8, 9, 10}
There are 400 seats in the theatre. Organizers want to make a profit of $2750 from ticket sales. Non students will pay $8, students $5. How many of each type of ticket will have to