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Pre-Calculus Homework Solutions 150

Pre-Calculus Homework Solutions 150 - 11 scale on map(cm...

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11. ¬ 2 1 0 .5 0 ¬ 2 x .4 1.5 x ¬ 200(2.4) 1.5 x ¬ 480 x ¬ 320 The cities are 320 miles apart. Pages 285–287 Practice and Apply 12. 1 8 0 or 4 : 5 13. 165 76 76 or 76 : 89 14. 2 1 0 8 8 or 104 : 9 15. 4 1 4 7 ,1 4 2 7 5 or about 25.3 : 1 16. B A H C 7 2 0 0 1 0 0 2 6 0 0 or 1 : 3 17. Rewrite 3 : 4 as 3 x : 4 x and use those measures for the two lengths of cable. 3 x 4 x ¬ 42 7 x ¬ 42 x ¬ 6 Use this value of x to find the measures of the two lengths of cable. 3 x 3(6) or 18 ft 4 x 4(6) or 24 ft 18. Rewrite 2 : 5 : 3 as 2 x : 5 x : 3 x and use those measures for the angles of the triangle. 2 x 5 x 3 x ¬ 180 10 x ¬ 180 x ¬ 18 Use this value of x to find the measures of the angles of the triangle. 2 x 2(18) or 36 5 x 5(18) or 90 3 x 3(18) or 54 19. Rewrite 6 : 9 : 10 as 6 x : 9 x : 10 x and use those measures for the angles of the triangle. 6 x 9 x 10 x ¬ 180 25 x ¬ 180 x ¬ 7.2 Use this value of x to find the measures of the angles of the triangle. 6 x ¬ 6(7.2) or 43.2 9 x ¬ 9(7.2) or 64.8 10 x ¬ 10(7.2) or 72 20. Rewrite 8 : 7 : 5 as 8 x : 7 x : 5 x and use those measures for the sides of the triangle.
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