Test Bank for College Algebra 8th Edition Blitzer 9780136922148

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COLLEGE ALGEBRA
EIGHTH EDITION
COLLEGE ALGEBRA
ESSENTIALS
SIXTH EDITION




Robert Blitzer
Miami Dade College

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,Blitzer College Algebra 8e
Chapter 0 Test Item File

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Evaluate the algebraic expression for the given value or values of the variable(s).
1) 8x + 6; x=5
A) 14 B) 46 C) 80 D) 34
Objective: (1) Evaluate Algebraic Expressions


2) 5x + 6; x = -2
A) -4 B) -16 C) 16 D) 4
Objective: (1) Evaluate Algebraic Expressions


3) 2(x + 4) + 19; x = -11
A) 5 B) -17 C) 55 D) -5
Objective: (1) Evaluate Algebraic Expressions


4) 3x2 + 4y; x = 9 and y = 7
A) 1,785 B) 271 C) 183 D) 757
Objective: (1) Evaluate Algebraic Expressions


5) (x + 4y)2 ; x = 3 and y = 3
A) 15 B) 49 C) 30 D) 225
Objective: (1) Evaluate Algebraic Expressions


6) 6 + 6(x - 7)3 ; x=9
A) 96 B) 54 C) -42 D) 18
Objective: (1) Evaluate Algebraic Expressions


7) x2 - 3(x - y); x = 6 and y = 4
A) -42 B) 14 C) 22 D) 30
Objective: (1) Evaluate Algebraic Expressions


9(x + 5)
8) ; x=7
2x + 4
17
A) 6 B) 12 C) 1 D)
2
Objective: (1) Evaluate Algebraic Expressions


y - 7x
9) ; x = -3 and y = 4
2x + xy
4 17 25 17
A) - B) - C) - D)
3 6 18 18
Objective: (1) Evaluate Algebraic Expressions




1

, Solve.
5
10) The formula C = (F - 32) expresses the relationship between Fahrenheit temperature, F, and Celsius
9
temperature, C. Use the formula to convert 59°F to its equivalent temperature on the Celsius scale.
A) 51°C B) 15°C C) 3°C D) 49°C
Objective: (2) Use Mathematical Models


11) A stone is dropped from a tower that is 810 feet high. The formula h = 810 - 16t2 describes the stone's height
above the ground, h, in feet, t seconds after it was dropped. What is the stone's height 3 seconds after it is
released?
A) 676 ft B) 666 ft C) 641 ft D) 691 ft
Objective: (2) Use Mathematical Models


12) If a rock falls from a height of 80 meters above the ground, the height H (in meters) after x seconds can be
approximated using the formula H = 80 - 4.9x2 . What is the height of the rock after 2 seconds?
A) -16.04 m B) 70.2 m C) 60.4 m D) 300.4 m
Objective: (2) Use Mathematical Models


13) As the relative humidity increases, the temperature seems higher than it is. The formula T = 0.118x + 59.63
approximates the apparent temperature for an actual temperature of 65°F, where x is the relative humidity. What
is the apparent temperature (to the nearest degree) for a relative humidity of 50%?
A) 60°F B) 66°F C) 110°F D) 352°F
Objective: (2) Use Mathematical Models


14) The winning times (in seconds) in a speed-skating event for men can be represented by the formula
T = 46.96 - 0.096x, where x represents the year, with x = 0 corresponding to 1920. (For example in 1992, x would
be 1992 - 1920 = 72.) According to the formula, what was the winning time in 1999? Round to the nearest
hundredth.
A) 39.38 sec B) 41.30 sec C) 40.34 sec D) 3,702.26 sec
Objective: (2) Use Mathematical Models


15) It is estimated that y, the number of items of a particular commodity (in millions) sold in the United States in year
x, where x represents the number of years since 1990, is given by the formula y = 1.29x + 4.37. That is, x = 0
represents 1990, x = 1 represents 1991, and so on. According to the formula, how many items sold in 1999?
A) 4.37 millions B) 50.94 millions C) 17.27 millions D) 15.98 millions
Objective: (2) Use Mathematical Models


Find the intersection of the two sets.
16) {2, 7, 5, 8} {5, 6, 2}
A) {2} B) {2, 5} C) {2, 5, 8, 7, 6} D)
Objective: (3) Find the Intersection of Two Sets


17) {2, 7, 8} {5, 11}
A) {2, 8} B) {7, 8} C) D) {2, 5, 8, 7, 11}
Objective: (3) Find the Intersection of Two Sets


18) {4, 6, 7, 9}
A) {4, 6, 7, 9} B) {7, 9} C) D) {4, 6}
Objective: (3) Find the Intersection of Two Sets


2