Integrated Algebra - January 2009

7. Alex earned scores of 60, 74, 82, 87, 87, and 94 on his first six algebra tests. What is the relationship between the measures of central tendency of these scores?

(1) median < mode < mean       (3) mode < median < mean
(2) mean < mode < median       (4) mean < median < mode

8 The New York Volleyball Association invited 64 teams to compete in a tournament. After each round, half of the teams were eliminated. Which equation represents the number of teams, t, that remained in the tournament after r rounds?"

(1) t = 64(r)0.5      (3) t = 64(1.5)r
(2) t = 64(–0.5)r    (4) t = 64(0.5)r'

9 The expression 9x2 – 100 is equivalent to

(1) (9x – 10)(x + 10) (3)     (3x – 100)(3x – 1)
(2) (3x – 10)(3x + 10)        (4) (9x – 100)(x + 1)

10 What is an equation of the line that passes through the points (3,–3) and (–3,–3)?

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

 

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