Pre-Calculus Homework Solutions 188

# Pre-Calculus Homework Solutions 188 - 9 Let x x2 x x 10 BD...

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Unformatted text preview: 9. Let x x2 x x 10. BD CD BA CA 83 y ¬24 ¬ 24 ¬2 6 y2 y ¬ CD DA BA BC x2 y 62 y 11. BD CD x 23 ¬2 2 3 2x ¬12 x ¬6 y2 y 12. ¬ 3600 ¬60 x ¬ 60 or 2 15 x ¬7.7 16. Let x represent the geometric mean. CA ¬ DA ¬ x 80 ¬ x2 x2 ¬48 ¬ 48 or 4 3 ¬6.9 x ¬3 x2 x x 45 x ¬ EH FH x ¬ 12 ¬ CD AD 8 x 15. Let x represent the geometric mean. EH. GH EH 16 12 x ¬x 1372 28 x y 3 x2 ¬33 ¬ 33 ¬ 38,416 x2 ¬196 x ¬ 196 or 14 17. Let x represent the geometric mean. BC ¬ BD 3 5 y x y ¬ 6 x ¬48 ¬ 48 or 4 3 x ¬1 x2 ¬ 3 ¬5 ¬3 5 x 3 5 x Z 15 ¬5 x ¬0.8 18. Let x represent the geometric mean. x 3 8 ¬x 5 x 6 3 5 ¬ 144 25 x2 wall x x Y X ¬ 144 25 12 ¬ 5 or 2.4 x 5 ft 19. Let x represent the geometric mean. 2 2 12 ft 6 W ¬ x x 2 5 6 Draw a diagram. Let YX be the altitude drawn from the right angle of WYZ. WX YX 5 12 ¬ 144 25 ¬ 20 36 x2 ¬ YX ZX x ¬ 20 36 12 ¬ ZX x ¬ 5ZX ¬144 ZX ¬28.8 Khaliah estimates that the wall is about 5 or 33.8 feet high. 20 36 25 ¬ 6 x 28.8 5 3 x x ¬0.7 20. Let x represent the geometric mean. Pages 346–348 Practice and Apply 13 7 13. Let x represent the geometric mean. 5 x x ¬6 x2 ¬30 x ¬ 30 x ¬5.5 14. Let x represent the geometric mean. 24 x ¬ 25 x 2 x ¬600 x ¬ 600 or 10 6 x ¬24.5 Chapter 7 ¬ x x ¬ x2 ¬ 65 49 5 7 65 x x ¬ x 190 ¬ 49 ¬1.2 65 49 65 7 ...
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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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