C Challenge

Use grouping symbols to make each equation true.

56. 9 + 3 − 2 + 4 = 6 9 plus 3 minus 2 plus 4 equals 6
57. 16 − 4 ÷ 2 + 3 = 9 16 minus 4 divides 2 plus 3 equals 9
58. 4 2 − 5 · 2 + 1 = 1 4 squared , minus 5 middle dot 2 plus 1 equals 1
59. 3 · 4 + 5 − 6 + 7 = 28 3 middle dot 4 plus 5 minus 6 plus 7 equals 28
60. 1. Geometry A cone has a slant height ℓ of 11 cm and a radius r of 3 cm. Use the expression π r ( ℓ + r ) pi r open script l plus r close  to find the surface area of the cone. Use 3.14 for π. Round to the nearest tenth of a square centimeter.
    2. Reasoning Does the surface area of the cone double if the radius doubles? If the slant height doubles? Explain.

Standardized Test Prep

SAT/ACT

61. What is the simplified form of 4 + 10 ÷ 4 + 6 ? 4 plus 10 divides 4 plus 6 question mark
    1. 1.4
    2. 9.5
    3. 12.5
    4. 24
62. What is the value of ( 2 a ) 2 b − 2 c 2 open 2 eh close squared . b minus 2 , c squared  for a = 2 , b = 4 , eh equals 2 comma b equals 4 comma  and c = 3 ? c equals 3 question mark
    6. 14
    7. 28
    8. 32
    9. 46
63. A shirt is on sale for $25 at the local department store. The sales tax equals 1 25 1 twenty fifth  of the shirt's price. What is the total cost of the shirt including sales tax?
    1. $17
    2. $26
    3. $27
    4. $33
64. You can find the distance in feet that an object falls in t seconds using the expression 16 t 2 . 16 , t squared , .  If you drop a ball from a tall building, how far does the ball fall in 3 s?
    6. 16 ft
    7. 48 ft
    8. 96 ft
    9. 144 ft

Mixed Review

See Lesson 1-1.

Write an algebraic expression for each word phrase.

65. 4 more than p
66. 5 minus the product of y and 3
67. the quotient of m and 10
68. 3 times the difference of 7 and d

See p. 786.

Tell whether each number is prime or composite.

69. 17
70. 33
71. 43
72. 91

Get Ready! To prepare for Lesson 1–3, do Exercises 73–80.

See p. 790.

Write each fraction as a decimal and each decimal as a fraction.

73. 3 5 3 fifths
74. 7 8 7 eighths
75. 2 3 2 thirds
76. 4 7 4 sevenths
77. 0.7
78. 0.07
79. 4.25
80. 0.425

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