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Question #1: What is f(f(2)) if f(x) = x² + 2?

Question #2: What is the real value of x in the equation log₃45 - log₃5 = log₇x?

Question #3: Which value of x satisfies the inequality | 2x | < x + 1 ?

Question #4: What is the range of (x - y) if 3 < x < 4 and -2 < y < -1?

Question #5: In the (x,y) plane, which of the following statements are true?

I. Line y + x = 5 is perpendicular to line y - x = 5.
II. Lines y + x = 5 and y - x = 5 intersect each other on the y axis.
III. Lines y + x = 5 and y - x = 5 intersect each other on the x axis.