Q35:
The operation ○ is defined by the equation x ○ y = (xy)/(x+y), where y ≠ x.
If 3 ○ y = 5
○ 4, then y =
A. 1/9
B. 4/15
C. 5/12
D. 12/5
E. 15/4
Answer:

Q36:
In the
xy
plane, line
l
and line
k
intersect at the point (16/5, 12/5).
What is the slope of
line
l
?
(1)
The product of the slopes of line
l
and line
k
is –1.
(2)
Line
k
passes through the origin.
11
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Q37:
Of the families in City
X
in 1994, 40 percent owned a personal computer.
The number of
families in City
X
owning a computer in 1998 was 30 percent greater than it was in 1994,
and the total number of families in City
X
was 4 percent greater in 1998 than it was in
1994.
What percent of the families in City
X
owned a personal computer in 1998?


12
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 Spring '12
 Krugers
 Personal computer, Newspaper A

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