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Answer:�7- f(x)= |x+2| 8- f(x)= |x+1| - 2 9- f(x)= |x| - 3 �10- f(x)= |x+5| 11- f(x)= |x| +1 12 f(x)= |x-4| - 2

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19. –3 < x ≤ 3  20.  1 ≤ x ≤ 4 21. x < –2 or x ≥ 1��22. x < –1 or x > 2  23. y b ≤ 0 or b > 3  24. y –2 ≤ z ≤ 3��25. y < –1 or y ≥ 1 26. x ≤ –1 or x > 2