book Maths Puzzle Numerical Ability

How do you solve and graph the inequality 17.2>13+0.7y?

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HOW IS THIS DONE?

WHAT IS THE SLOPE OF A LINE THAT IS PERPENDICULAR TO THE LINE PASSING THROUGH THE POINTS (8,3) AND (10,6)?
A top spins 200 revolutions/minute. Find the angular velocity in radians/second.