exam Maths Puzzle Numerical Ability

find the maximum value of y=-x^2 + 6x

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exam Other Question

One number is 3 less than another. If 10 times the smaller number minus 3 times the larger number is 33, find the two numbers. Find the vertex, focus, and directrix of the graph of the equation:

-20(x+2)= (y+3)^2