exam Maths Puzzle Numerical Ability

Please solve. |x - 1.5| <= 3

I tried and got X <= 4.5 or X >= -1.5

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exam Other Question

How do I complete the square for m(x)=-x^2+6x-4?

I tried dividing 6x by 2 and factored out -1 from x^2+6x. But how do you get the other number? there are 155 coin nickels,dimes, quarters= 24.95 the number of dimes is t more than twice the number of nickels