exam Maths Puzzle Numerical Ability

What is a transformation that flips a graph or figure across a line?

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exam Other Question

The lines described by 3x-y=17, 2x+5y=17, x+2y=a+b, and x-y=3b-5a all pass through the same point. What is the ratio of a to b? can a trapezoid have 4 obtuse angles?