exam Maths Puzzle Numerical Ability

find the x and y intercepts of y=-2x+7

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I need to find the proof for "Corresponding altitudes of any two similar triangles have the same ratio as the corresponding sides" Hello out there,I need some help with some problems,the first one is,Solve the system of equations by substitution:y=x^2+2x-2 and y=3x+4.The next one is,Which of the following poin