exam Maths Puzzle Numerical Ability

f(x)=-2x^2+11x+7

find the line of symmetry of the given function.

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exam Other Question

Find the periometer of a rectangle if the long side is 555mm and the short side is 185mm.

Thanks! please i need help with this problem: the shortest distance from the centre of a circle to a chord is 5 cm. find the radius (2d.p.) of the circle if the chord is 3*2 times longer than the radius.