exam Maths Puzzle Numerical Ability

Graph y= 2x^2-7

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exam Other Question

the distance between the road of a bridge and the top part of its arch is 3m. if the arch of the bridge is given be the equation h(x) = 7x-x squared, find the height of the bridge Could you please show me the step by step solution to this problem? Thank you

2(m+4)+3=3(m+2)+1m=?