Pre-Calculus Homework Solutions 185

Pre-Calculus Homework Solutions 185 - 9. Using...

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Unformatted text preview: 9. Using corresponding angles, AM CM 25 x 20 MAD 300 3x2 60x 0 3x2 60x 300 0 x2 20x 100 0 (x 10)(x 10) x 10 0 x 10 3x The scale factor is DM 12 BM 5 : 2. PQ 10. ML PR MN QR LN MCB. 17. DM BM 3x 12 BC CM BC 6 3( 10) 12 4(8 KJ) 32 4(KJ) 32 2 14. GK KJ GK 6 GK 6 7(GK) GK 15. GK KJ 6 4 18. x 3 12 27 12 87 7.5 8 4.5 or 87 462 height of fence 19. height of backboard 4 ft x 48 x shadow of fence shadow of backboard ¬ 20 in. 65 in. ¬ 20 65 3120 ¬20x 156 ¬x The height of the top of the backboard is 156 inches, or 13 feet. 20. B; X Y is spent, which is X X Y as part of the weekly salary. Chapter 6 Standardized Test Practice Pages 338–339 GH HI 7 14 7 7 7 1. B; | 8 2. B; d 2| [5 | 6| ( 6 3)]2 (2 17)2 ( 2)2 ( 15)2 4 225 229 miles 42 6 GH HI 9 HI 10x 420 x 42 The perimeter of MB ¬ 8 10 ¬448 6(MB) ¬6(MB) ¬MB perimeter of ABC is 10 5x 12(KJ) 12(KJ) 16(KJ) KJ perimeter of perimeter of 7 10 13 x 30 x ¬ AB AC 75 27 4.5 The 30. GH HI 12 4 3. A 4. D 6(HI) 36 HI 6 GI GH HI 9 6 or 15 16. Let x represent the perimeter of CB EF 10 14 10 14 60 7.5 BC CM 7.5 6 5 1 10 or 2 6 1 12 or 2 3 1 6 or 2 GK KJ 8 KJ KJ AC AM 10 8 8(BC) BC 30 12 or Corresponding sides are proportional, so the triangles are similar by SSS Similarity. 11. PTS QTR since they are vertical angles. m PTS m QTR 90. m PTS m S m P 180 90 62 m P 180 m P 28 m QTR m R m Q 180 90 66 m Q 180 m Q 24 Since only one pair of corresponding angles is congruent, the triangles are not similar. 12. ED CB so AED ACB and ADE ABC because corresponding angles are congruent. Then the triangles are similar by AA Similarity. 13. CMA ACB and A A, so ABC ACM by AA Similarity. (AM)2 62 102 (AM)2 36 100 (AM)2 64 AM 8 5 5. A; 1.2 fcm t 1.5x x 25 ¬ 11.x ftcm ¬22.5 ¬15 ft 5 6. B; 45 63 7 , so the dimensions could be 7 inches by 5 inches. s p 7. C; u r because side UT corresponds to side RQ and side ST corresponds to side PQ. 8. D 9. counterexample DEF. ACB DEF DEF is 42 units. 187 Chapter 6 ...
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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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