exam Maths Puzzle Numerical Ability

4) Consider the function f (x) = x^ + 4x + 1

a) Find h, the x-coordinate of the vertex of this parabola.
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exam Other Question

Adult tickets for a play cost $11 and child tickets cost $10. If there were 23 people at a performance and the theater collected $246 from ticket sales, how many children attended the play? Could you please take the time to help me solve this problem: What is the sum of the roots of the quadratic equation: a x2 + b x + c = 0, where a, b, and c are all non-zero real constants.

Thanks for your help.