College Level Math Practice Test With Answer Key - Mission Del Paso Campus Page 14
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17ANSWER KEY
8.
Rational Expressions: Perform the indicated operation {p.280 #47, 50, 55, 57}
2
5
3
10
x
x
a.
b.
2 x
2
(
3
)(
3
)
x
x
2
4
3
8
a
a
a
c.
d.
2
4
(
2
)
a
a a
9.
Rational Expressions: Solve the following equations {p.279#1, 13, 23, 37}
a.
x = 72
b.
x = -3
c.
x = 15
d.
x = -1
10.
{p.56 EX# 3, 4, 7, 8}
Solve the following absolute value equations
a.
{24, -20}
b.
The absolute value of any expression is never negative.
c.
{-1, 1}
d.
{3/4, 5}
11.
{p.314 #35, 49, 64, 87}
Exponentials & Radicals: Simplify the following expressions
7
1
2
7 2
4 2
c.
d.
a.
b.
a b
5
2 x
x
12.
{p.316 #4, 28} & {p.320 #12, 62}
Exponents & Radicals: Perform the indicated operation
3
2
10
5
2
3 6 7
a.
x
x
b.
c.
xy
y
d.
3
13.
Imaginary Numbers (i): Perform the indicated operation {p.337#1, 9, 15, 18, 23, 37, 45, 49}
Note: to simplify imaginary exponents use the chart below.
Remainder = Answer
0
=
1
1
=
i
2
=
-1
3
=
-i
Divide the exponent by 4
Step 1
The remainder gives you the answer.
Step 2
2 6
a.
i
b. 6 – 4i
c. 18 + 12i
d. 30
28
21
e.
i
f. 1
g. 63
h. 20
25
25
14.
Simplify the following complex fractions {purplemath.com}
2
4
3
1
x
x
t
y x
a.
b.
c.
d.
2
3
2
4
1
x
t
15.
Functions: Perform the indicated operation {p. 190 Ex# 3}
2
2
5
3
a.
3x – 4
b.
x
x
3
c.
-x + 2
d. all real numbers except x
2
16.
Functions: Find the Following {p.191 EX# 4}
2
2
1
a.
x
x
b. 5
Page 14 of 17
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