Mathematics B Regents High School Examination - The University Of The State Of New York, 2007 Page 3
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28Use this space for
− =
, x > a, which expression is equivalent to x?
3 If
x
a
b
computations.
2
(1) b
– a
(3) b – a
2
+ a
(4) b + a
(2) b
4 What is the total number of points of intersection of the graphs of the
2
equations xy = 12 and y = –x
+ 3?
(1) 1
(3) 3
(2) 2
(4) 4
25
5 The expression i
is equivalent to
(1) 1
(3) i
(2) –1
(4) –i
1
1
+
3
3
x
6 The expression
is equivalent to
1
1
+
x
3
+
+
x
1
x
3
3
(1)
(3)
+
+
x
3
x
3
1
(2) 2
(4)
3
7 The term “snowstorms of note” applies to all snowfalls over 6 inches.
The snowfall amounts for snowstorms of note in Utica, New York, over
a four-year period are as follows: 7.1, 9.2, 8.0, 6.1, 14.4, 8.5, 6.1, 6.8,
7.7, 21.5, 6.7, 9.0, 8.4, 7.0, 11.5, 14.1, 9.5, 8.6
What are the mean and population standard deviation for these data,
to the nearest hundredth?
(1) mean = 9.46; standard deviation = 3.74
(2) mean = 9.46; standard deviation = 3.85
(3) mean = 9.45; standard deviation = 3.74
(4) mean = 9.45; standard deviation = 3.85
[3]
[OVER]
Math. B – Jan. ’07
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