Mathematics B Exam Worksheet - Regents High School Examination, The University Of The State Of New York, 2005 Page 5

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2
13 The roots of the equation 2 x
– 8x – 4 = 0 are
Use this space for
computations.
(1) imaginary
(2) real, rational, and equal
(3) real, irrational, and unequal
(4) real, rational, and unequal
14 What is the equation of a circle with center (–3,1) and radius 7?
2
2
(1) (x – 3)
+ (y + 1)
= 7
2
2
(2) (x – 3)
+ (y + 1)
= 49
2
2
(3) (x + 3)
+ (y – 1)
= 7
2
2
(4) (x + 3)
+ (y – 1)
= 49
15 Which scatter diagram shows the strongest positive correlation?
y
y
x
x
( 1 )
( 3 )
y
y
x
x
( 2 )
( 4 )
7
16 The expression
is equivalent to
2
3 –
2
3 +
+
(1)
(3)
3
2
7
2
21 +
(2)
(4) 3
2
7
[5]
[OVER]
Math. B – Jan. ’05

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