exam Maths Puzzle Numerical Ability

41 -(2x+4)<_ 2(x + 1)+x
Use set-builders notation to describe complete solution.
{xlx ? ?}
Round to the nearest tenth.
Will someone please help me with this.

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Hi Can I have some help with the following problem?

The resistance R of a wire varies directly as its length L and inversely as the square of its diameter d.
(a) Write an equat If (3,-6) are coordinates of a point on the graph of y=f(x), give the coordinates of a point on the graph of y=f(x)-4.