Pre-Algebra Chapter 9
Pre-Algebra Chapter 9
Pre-Algebra Chapter 9
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
56. GEOMETRY Find the perimeter of a square that has an area of 2080 <br />
square meters. Round to the nearest tenth.<br />
57. CRITICAL THINKING What are the possibilities for the ending digit of a<br />
number that has a whole number square root? Explain your reasoning.<br />
Standardized<br />
Test Practice<br />
Extending<br />
the Lesson<br />
58. WRITING IN MATH Answer the question that was posed at the beginning<br />
of the lesson.<br />
How are square roots related to factors?<br />
Include the following in your answer:<br />
• an example of a number between 100 and 200 whose square root is a<br />
whole number, and<br />
• an example of a number between 100 and 200 whose square root is a<br />
decimal that does not terminate.<br />
59. Which statement is not true?<br />
A 6 39 7 B 9 89 10<br />
C<br />
7 56 8<br />
4 17 5<br />
60. Choose the expression that is a rational number.<br />
A 361 B 125 C 200 <br />
325 <br />
61. Squaring a number and finding the square root of a number are inverse<br />
operations. That is, one operation undoes the other operation. Name<br />
another pair of inverse operations.<br />
62. Use inverse operations to evaluate each expression.<br />
a. (64)2 b. (100 )2<br />
c. (169 )2<br />
63. Use the pattern from Exercise 62 to find (a)2 .<br />
D<br />
D<br />
Maintain Your Skills<br />
Mixed Review<br />
ALGEBRA Graph each inequality. (Lesson 8-10)<br />
64. y x 2 65. y 4 66. y 2x 3<br />
ALGEBRA Solve each system of equations by substitution. (Lesson 8-9)<br />
67. y x 2 68. y x 3 69. y 2x 5<br />
x 5 y 0 y 3<br />
70. Determine whether the relation (4, 1), (3, 5), (4, 1), (4, 2) is a function.<br />
Explain. (Lesson 8-1)<br />
71. Suppose a number cube is rolled. What is the probability of rolling a 4 or<br />
a prime number? (Lesson 6-9)<br />
Solve each proportion. (Lesson 6-2)<br />
72. n 9 1 5<br />
73. 4 27<br />
b 1 6<br />
7<br />
74. <br />
36<br />
8 .4 0 .5 <br />
x<br />
Getting Ready for<br />
the Next Lesson<br />
PREREQUISITE SKILL Explain why each number is a rational number.<br />
(To review rational numbers, see Lesson 5-2.)<br />
75. 1 0<br />
76. 1 1 77. 0.75<br />
2<br />
2<br />
440 <strong>Chapter</strong> 9 Real Numbers and Right Triangles<br />
78. 0.8 79. 6 80. 7
Change language