book Maths Puzzle Numerical Ability

what is the absolute value for this problem? 2r + 9 > 19 The 2r + 9 is in absolute equations marks, my computer does not have those symbols.

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A rectangle has a diagonal whose length is x. The rectangle is twice as long as it is wide. What is the area of the rectangle in terms of x? What is the next term of the sequence 9, 6, 4, 8/3, . . . ?