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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; 49 0.143 2.646 49 2. C; 2(7) 3 11, so (7, 11) is on the line. 2(4) 3 5, so (4, 5) is on the line. 2( 2) 3 7, so ( 2, 10) is not on the line. 2( 5) 3 13, so ( 5, 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; DE EF so DE EF . 8 x 3 ¬ 3 x 7 8 x ¬ 3 x 10 5 x ¬ 10 x ¬ 2 5. A; ACF DCF ACD by the Angle Addition Postulate. So m ACF m DCF 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. Call this length d . d 2 (120) 2 53 1 3 2 d 2 14,400 25, 9 600 d ¬ 17,244.4 d ¬ 131 yd 10. inverse 11. ( p q ) ( q r ) ( p r ) Martina drank 300 mg of calcium.
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