Integrated Algebra - January 2011

27 What is an equation of the axis of symmetry of the parabola represented
by y = -x2 + 6x - 4?

(1) x = 3    (3) x = 6
(2) y = 3    (4) y = 6

28 Which equation has roots of -3 and 5?

(1) x2 + 2x - 15 = 0     (3) x2 + 2x + 15 = 0
(2) x2 - 2x - 15 = 0     (4) x2 - 2x + 15 = 0

29 A spinner that is equally divided into eight numbered sectors is spun
20 times. The table below shows the number of times the arrow
landed in each numbered sector.

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