exam Maths Puzzle Numerical Ability

Consider the function f(x)=x^2+6x-2.

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

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exam Other Question

1)A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation converting Kelvin tempera Decide whether the graph of the equation is a line, a parabola, or a circle.
x^2+4x+y^2-6y=3