Page 291 - Basic College Mathematics with Early Integers

268 C HAPTE R 3 I FRACTIONS

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79. In a group of 100 blood donors, typically have 80. Find the difference in length of two scarves if one
3 25 5 2
type A Rh-positive blood and have type A scarf is of a yard long and the other is of a yard
50 12 3
Rh-negative blood.What fraction have type A long.
s of a yard
blood?

5
12 of a yard

Insert 6 or 7 to form a true statement.
81. 6 82. 3 5 16 6 17
5
4
14
35
11 11 35 35 83. - - 42 84. - - 105
(3.6) Simplify each complex fraction.

2 3 2 1 5 1
- -
5 7 5 2 6 4
85. 86. 87. 88.
7 11 3 7 1
- -
10 7 4 10 12

1 2 4
Evaluate each expression if x = , y =- , and z = .
2 3 5
89. y 2 90. x - z

Write each improper fraction as a mixed number or a whole number.

15 39 7 125
91. 92. 93. 94.
4 13 7 4

Write each mixed number as an improper fraction.

1 8
95. 2 96. 3
5 9

Evaluate each expression. Use the order of operations to simplify.

5 1 4 2 1 2 9 1 2 1 2 1 3
97. , # 98. - a b 99. # - # 100. - # a + b
13 2 5 27 3 10 3 5 11 7 5 10

(3.7) Perform operations as indicated. Simplify your answers. Estimate where indicated.

2 10 3 1 1
101. 31 + 14 102. 7 103. 9 104. 8
7 21 8 7 5
5 3 3
9 - 4 - 5
6 5 11
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