Pre-Calculus Homework Solutions 189

Pre-Calculus Homework Solutions 189 - 21. Let x x y ¬AD....

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Unformatted text preview: 21. Let x x y ¬AD. AD BD AD 5 x y2 6x x ¬9 FH EH 12 x y2 6 50 3 y2 y y 100 ¬ 100 ¬10 5 x z EH ¬ GH x ¬ 12 JM LM 8 x z2 z2 z 29. z2 z2 x ¬ 16 x2 ¬128 x ¬ 128 or 8 2 x ¬11.3 24. Let x QS. 15 z ¬ QS RS 15x 15x 15x x ¬7 x2 ¬147 x ¬ 147 x ¬12.1 25. Let x UW. VW UW 2 x x 15 5 y 30. x2 x2 x ¬ 13 x2 ¬26 x ¬ 26 x ¬5.1 26. Let x ZN. 4y ¬25 ¬ 25 or 5 ¬88 ¬ 88 or 2 22 ¬9.4 ¬ y2 y y 25 ¬ 36 x x y y2 y2 y2 y y ¬24 ¬ 24 or 2 6 ¬4.9 36 6x x ¬100 ¬84 ¬21 ¬1296 ¬216 ¬ 216 or 6 6 ¬14.7 z ¬3 z2 z z 6x ¬ 10 4 6x y 3 8 z 28. 4 6x2 x2 x x ¬33 ¬ 33 ¬5.7 6 8 ¬102 ¬100 ¬84 ¬ 84 or 2 21 ¬9.2 y4 21 4 6x 31. 36 x2 x x 8 ¬5 3 16 4y y z z x ¬8 y 25 10 8 3 ¬5 y 42 16 x2 x x x ¬ 10 x ¬ 40 3 y ZN ¬ XN x2 x 52 ¬152 25 ¬225 z2 ¬200 z ¬ 200 or 10 2 z ¬14.1 z ¬x ¬z2 2 ¬(10 2) ¬200 15y ¬ UW TW YN ZN 2.5 x 50 2 6 50 3 3 2500 100 9 1600 9 ¬ 1600 or 40 9 3 z2 LM ¬ KM PS QS 21 x ¬x z 6 x2 6x z2 x2 ¬144 x ¬ 144 or 12 23. Let x ¬LM. 27. y 6 ¬ CD x2 ¬45 x ¬ 45 or 3 x ¬6.7 22. Let x ¬EH. 3 ¬ 6x x z z2 z2 z2 z z 8 ¬x 6 ¬64 ¬100 ¬ 50 3 191 ¬ y x ¬7x2 2 ¬7(6 6) ¬1512 ¬ 1512 or 6 42 ¬38.9 z ¬ 6x ¬42x2 2 ¬42(6 6) ¬9072 ¬ 9072 or 36 7 ¬95.2 Chapter 7 ...
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