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COLLEGE ALGEBRA AND
TRIGONOMETRY
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SE
IS
NO
C ON
ED
M
, INSTRUCTOR’S
TESTING MANUAL
COLLEGE ALGEBRA AND
R
TRIGONOMETRY
EU
SEVENTH EDITION
SS
OI
Margaret L. Lial
NN
American River College
John Hornsby
CO
University of New Orleans
David I. Schneider
ED
University of Maryland
M
Callie J. Daniels
St. Charles Community College
, 1
CHAPTER R, FORM A NAME
COLLEGE ALGEBRA AND TRIGONOMETRY DATE
ì 54 16 ü
1. Let A = ïí-9.6, , 6π , 0, 13, 2.15, , 49 ïý .
ïîï 7 5 ïþï
List the elements of A that belong to the given set.
a. Natural numbers 1. a. ____________
b. Rational numbers b. ____________
c. Irrational numbers c. ____________
2. Evaluate the expression if x = -2 , y = -4 , and z = 1 : 2. ______________
2
2y - x
2
( y - 3z )
R
EU
3. Identify the property illustrated. Let a, b, and c represent any
real numbers.
3a + 4b 4a - 9b
12. - 12. ______________
7 a - 5b 5b - 7 a
xy
13. 13. ______________
11 11
+
x y
2 ⋅ 3 − 42
14. 14. ______________
−3 ( 2 + 5 )
Factor completely.
R
15. x3 y 2 - 4 x3 + 8 y 2 - 32 15. ______________
EU
16. 8a 3 + 64b3 16. ______________
17. 6 x 4 -11x3 - 35 x 2 17. ______________
SS
18. 28 x 2 + 4 x - 9 18. ______________
-2 3
æ125 ö÷
19. Evaluate çç .
OI 19. ______________
çè 27 ÷÷ø
-6
NN
æ x 2 3 y 3 4 z -1 2 ö
20. Simplify çç -1 4 -1 6 ÷÷÷ so that there are no 20. ______________
çè x z ÷ø
negative exponents. Assume that all variables
represent positive real numbers.
CO
Simplify. Assume that all variables represent positive real numbers.
21. 3
8x5 y 3 z 4 21. ______________
ED
22. x 112 x + 4 175 x 3 22. ______________
23. (3 + 4 2 )(5 - 4 )
3 3
23. ______________
M
12
24. Rationalize the denominator of and simplify. 24. ______________
5- 2 7
4
25. Write the fraction as a decimal and a percent. 25. ______________
5
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