exam Maths Puzzle Numerical Ability

Identify the axis of symmetry, create a suitable table of values, then sketch the graph (including the axis of symmetry). y = x^2 - 4x

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exam Other Question

Solve.

Suppose that the cost C, in dollars, of producing x items is given by
c = 3x squared - 50x + 1800. How many items can be produced for $13,000? (10+(square root 20))-(4-(square root 45))