exam Maths Puzzle Numerical Ability

Adult tickets for a play cost $17 and child tickets cost $2. If there were 22 people at a performance and the theater collected $179 from ticket sales, how many adults and how many children attended the play?

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exam Other Question

(6x/x-y) - (3y/y-x) + (5/x^2-y^2)
Please simplify. I have reduced to (6x^2+9xy+3y^2+5)/[(x-y)(x+y)]. I think you can break down further, but not sure.

If a separate into to f The height h in feet of an object after t seconds is given by the function
h = -16t2 + 30t + 8. How long will it take the object to hit the ground? Round your answer to the nearest thousandth.

Thanks in advance