1 Melissa and Joe are playing a game with complex numbers. If Melissa has a score of 5 - 4i and Joe has a score of 3 + 2i, what is their total score?

(1) 8 + 6i    (3) 8 -6i
(2) 8 + 2i    (4) 8 -2i.

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2 A store advertises that during its Labor Day sale $15 will be deducted from every purchase over $100. In addition, after the deduction is taken, the store offers an early-bird  discount of 20% to any person who makes a purchase before 10 a.m. If Hakeem makes a purchase of x dollars, x > 100, at 8 a.m., what, in terms of x, is the cost of Hakeem’s  purchase?

(1) 0.20x - 15      (3) 0.85x - 20
(2) 0.20x -3         (4) 0.80x - 12

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3 A bug travels up a tree, from the ground, over a 30-second interval. It travels fast at first and then slows down. It stops for 10 seconds, then  proceeds slowly, speeding up as it goes. Which sketch best illustrates the bug’s distance (d) from the ground over the 30-second interval (t)?

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4 The inverse of a function is a logarithmic function in the form y = logb x. Which equation represents the original function?

(1) y = bx     (3) x = by
(2) y = bx    (4) by = x

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