exam Maths Puzzle Numerical Ability

How do I add and simplify?

-1/x-1+1-x/x

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exam Other Question

h(x)=x-6 if o<or=x <or=1 and 3 if x>1 find h(2and1/2) Can someone please help me with these??
a) The roller on a computer printer makes 2200r/min. What is its angular velocity?
b) The arm of a car windshield wiper is 32.4 cm long an