exam Maths Puzzle Numerical Ability

Determine which two equations represent parallel lines.
y = -5x + 2
y = 5x + 2
y = 1/5 x + 2
y = -5x + 5

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exam Other Question

How do I graph 3-x>0? The sum of the number of sides of two polygons is 10. The sum of the number of diagnols if the same convex polygon is 11. What are the names ofthe two polygons?