exam Maths Puzzle Numerical Ability

The length of a rectangle is 3 times as much as the width. the width is given as 6. find the length and the perimeter of the rectangle.

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Solve the inequality and graph it.
3 -5x >/ 18
-1/2x + 7 < 5 + x
Solve and graph.
-3 >/ 5-2x/-7
Graph the following.
3x -2 < 1
Graph the following compound inequality
Story Problem:
An isosceles right triangle with legs of length "a".
I need to write a formula in simplified radical form for the length of the hupotenuse "c" in terms of "a"