exam Maths Puzzle Numerical Ability

Identify the vertex of the parabola defined by y = 2x(squared)+8x+9

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exam Other Question

Factor trinomials.
2x^2+9x-18
(2x )(x )
Need help!
I have to find the missing coordinate to complete the ordered-pair solution to the given linear equation..Can you help me? Thanks....

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Number 16

5x-2y=9
(a) (7, )
(b) ( ,-7)