book Maths Puzzle Numerical Ability

please help me! how do you find the exact equation of an euler line of a acute
triangle?

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book Other Question

I need to solve by factoring: m^2-2m-63=0

Thanks for your help. a scale model of a while is being built. the actual length of the whale is 65 feet. the scale of the model is 2 inches: 3 feet. what will be the length of the model ?