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Pre-Calculus Homework Solutions 82

# Pre-Calculus Homework Solutions 82 - c 127.3< ¬ c Since...

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8. C; 4 y x ¬ 8 4 y ¬ x 8 y ¬ 1 4 x 2 1 4 ( 4) 1, so the slope of the perpendicular line is 4. y 4 x 15 is the only choice with slope 4. 9. C; the number 2 in y 2 x 5 is the slope, which determines the steepness of the line. 10. 3 4 x 3 6 3(10) 11. m FHC m FHD 180 FHD HGB m FHD m HGB m FHC m HGB ¬ 180 m FHC 70 ¬ 180 m FHC ¬ 110 The flag holder rotates 110°. 12. CHG ¬ HGB m CHG ¬ m HGB m CHG ¬ 70 13. m ¬ ( ( y x 2 2 y x 1 1 ) ) ¬ 6 9 4 3 ¬ 2 6 or 1 3 14. The ball did not reach home plate. The distance between second base and home plate forms the hypotenuse of a right triangle, with second base to third base as one leg, and third base to home plate as the other leg. The Pythagorean Theorem is used to find the distance between second base and home plate. 90 2 90 2 ¬ c 2 8100 8100
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Unformatted text preview: c 127.3 < ¬ c Since the ball traveled 120 feet and the distance from second base to home plate is about 127.3 feet, the ball did not make it to home plate. 15a. m 5 ¬ } ( ( y x 2 2 2 2 y x 1 1 ) ) } 5 ¬ } 48 2 2 2 4 1 4 } 5 ¬ 4 15b. The slope represents the increase in the average monthly cable bill each year. 15c. The slope of the line through the points is 4. One point on the line is (1, 44). Find the equation of the line. y 2 44 5 ¬ 4( x 2 1) y 2 44 5 ¬ 4 x 2 4 y 5 ¬ 4 x 1 40 After 10 years the cable bill will be y 5 4(10) 1 40, or \$80. Chapter 3 84...
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