Pre-Calculus Homework Solutions 178

# Pre-Calculus Homework Solutions 178 - 4. Stage 4: XZ XW WZ...

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4. XZ 5 XW 1 WZ 33.25 5 XW 1 11.45 21.8 5 XW In order to show Y w Z w ± V w W w ,we must show that } X V V Y } 5 } X W W Z } . } X V V Y } 5 } 3 1 4 8 . . 8 3 8 2 } or } 4 2 3 2 6 9 } . } X W W Z } 5 } 1 2 1 1 .4 .8 5 } or } 4 2 3 2 6 9 } . Thus, } X V V Y } 5 } X W W Z } 5 } 4 2 3 2 6 9 } .Since the sides have proportional lengths, Y w Z w ± V w W w . 5. Let x represent the perimeter of n DEF .The perimeter of n GFH 5 2 1 2.5 1 4 or 8.5. } F E H F } 5 ¬ } 6 4 } 5 ¬ } 8 x .5 } 51 5 ¬ 4 x 12.75 5 ¬ x 6. Let x represent the perimeter of n RUW .The perimeter of n STV 5 12 1 18 1 24 or 54. } U V W T } 5 } 2 1 1 8 } 5 } 5 x 4 } 1134 5 18 x 63 5 x 7. } 18 x 2 x } 5 ¬ } 1 1 0 4 } 252 2 14 x 5 ¬ 10 x 252 5 ¬ 24 x 10.5 5 ¬ x 8. } 4 x } 5 } x 1 6 3 } 4 x 1 12 5 6 x 12 5 2 x 6 5 x 9. } 2 5 x } 5 ¬ } 1 x 0 } 2 x 2 5 ¬ 50 x 2 5 ¬ 25 x 5 ¬ 6 5 Because x represents length, x cannot be negative. So,
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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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