Solutions
Solutions to Try Its
1. 2. 3. 4. 5. . Excluded values are and . 6. 7. 8. 9. 10. Horizontal line: 11. Parallel lines: equations are written in slope-intercept form.![Coordinate plane with the x-axis ranging from negative 5 to 5 and the y-axis ranging from negative 1 to 6. Two functions are graphed on the same plot: y = x/2 plus 5 and y = x/2 plus 2. The lines do not cross.](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/09/25200328/CNX_CAT_Figure_02_02_007.jpg)
Solutions to Odd-Numbered Exercises
1. It means they have the same slope. 3. The exponent of the variable is 1. It is called a first-degree equation. 5. If we insert either value into the equation, they make an expression in the equation undefined (zero in the denominator). 7. 9. 11. 13. 15. 17. ; 19. ; when we solve this we get , which is excluded, therefore NO solution 21. ; 23. 25. 27. 29. 31. 33. 35. 37. Parallel![Coordinate plane with the x and y axes ranging from negative 10 to 10. The functions 3 times x minus 2 times y = 5 and 6 times y minus 9 times x = 6 are graphed on the same plot. The lines do not cross.](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/09/25200331/CNX_CAT_Figure_02_02_202.jpg)
![Coordinate plane with the x and y axes ranging from negative 10 to 10. The function y = negative 3 and the line x = 4 are graphed on the same plot. These lines cross at a 90 degree angle.](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/09/25200335/CNX_CAT_Figure_02_02_204.jpg)
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55. 30 ft
57. $57.50
59. 220 mi