Math Practice Test With Answer Key - Woodland Community College Page 29
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37 In 2007, Germany had a population of 82,800 thousand. At that time, Germany’s population was
44.
declining at a rate of 0.035% per year. If this continues, how long will it take Germany’s population to
−
=
. 0
00035
t
y
y
e
reach 82,000 thousand? Use
and round to nearest tenth.
0
2
11
9 .
lb
/
in
Find the elevation of a delta jet of the atmosphere pressure outside the jet is
. Use
45.
=
−
. 0
21
x
P
14
7 .
e
gives the average atmosphere pressure P in pounds per square inch, at an altitude x, in
miles above the sea level. Round the answer to nearest tenth.
=
−
−
−
2
x
y
4
y
6
Graph parabola. Find the vertex.
46.
+
+
+
−
=
2
2
x
y
2
x
4
y
11
0
Find the center and radius of the circle and then graph.
47.
−
=
2
2
Graph the equation
4
x
25
y
100
48.
+ y
=
2
2
Graph the equation
49.
4
x
9
36
2
2
x
y
+
=
Graph the equation
50.
2
8
8
= y
+
−
2
Graph the equation
51.
x
(
) 3
1
+
=
+
=
−
=
+
=
2
2
2
2
2
2
2
5
x
5
y
60
x
3
y
21
x
2
y
5
x
y
1
solve (a)
(b)
(c)
(d)
52.
+
=
−
+
=
−
=
=
2
2
x
y
1
x
y
4
x
y
1
y
x
Math practice Test answers
2
3
2
1.
a. 3x
(5x
‐4x
+9x‐10), b. (4x‐9y) (4x+9y) c. (4‐x)(4x‐7), d. (2x‐13) (2x+13),
2
e. prime, f. (x+5)(x+6), g. (x+6)(2x‐3), h. (5x‐4)(25x
+20x+16),
2
2
i. 4(x
‐xy‐6y
)= 4(x‐3y)(x+2y)
−
−
5
4
5
−
, 4 −
2. a. ±
, b,
3
, c.
, 0,2, d.
,‐1
2
3
3
1
7
3. a.‐2,
, b. ‐2,
11
3
4. 4.5 sec
5. 5, 10
6. 12
7. ‐16, ‐15
∈
∈
8. a. {x/ x
R and x≠2,3}, b. {x/x
R and x≠0,6}
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