Pre-Calculus Homework Solutions 51

Pre-Calculus Homework Solutions 51 - 14a Possible lengths...

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Chapter 2 Standardized Test Practice Pages 122–123 1. D; 2 49 , 0.143 , 2.646 , 49 2. C; 2(7) 2 3 5 11, so (7, 11) is on the line. 2(4) 2 3 5 5, so (4, 5) is on the line. 2( 2 2) 2 3 52 7, so ( 2 2, 2 10) is not on the line. 2( 2 5) 2 3 13, so ( 2 5, 2 13) is on the line. 3. A; a protractor is used to measure angles, not lengths. A calculator is not a measuring tool. A centimeter ruler is more accurate than a yardstick because its unit of measurement (centimeters) is smaller. 4. B; D w E w > E w F w so DE 5 EF . 8 x 2 3 5 ¬ 3 x 1 7 8 x 5 ¬ 3 x 1 10 5 x 5 ¬ 10 x 5 ¬ 2 5. A; / ACF 1 / DCF 5 / ACD by the Angle Addition Postulate. So m / ACF 1 m / DCF 5 90 since / ACD is a right angle. Then / ACF and / DCF are complementary angles. 6. C; inductive reasoning uses specific examples to make a conjecture. 7. A 8. A; divide both sides by 3. 9. The shortest distance is the length of the hypotenuse of the right triangle whose legs have lengths 120 yd and 53 } 1 3 } yd. Use the Pythagorean Theorem to find the length of the hypotenuse.
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.

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