896 



ANsu'Kr.9 



16. 



18. 



0, or 



13 2r + 2y'- 10r- 

 15. 6z-4|f = 20. 

 17. Oz-8y + 14 = 0. 

 19. p = t&n6. 



Page 84 Art. 52. 



2. (a) x + y = 7; 03) jf + 8*=13; (7) 3z + 2y+16 

 -20x +177 = 0. 



14. C <rz -f 2 &x = & - rf. 

 -8 + 21 =0; (f|, JJ). 

 y- 26 = 0. 



6. Tee. 7. Yes. 



8. No ; this point and the origin are on opposite sides of the line 



9* + y = 21, 



10. Equations of the sides are 



Equations of the medians are : 



Medians intersect in the point ( 3 f \ - 

 li. -- 12 - 3x- = 0, 3x- 



Pages 85, 86. Art. 53. 



4. f =- 



y = - 



7 - 



6. (a) y= 



8. -41. 7. -f. 8. Yes. 



9. They differ in their ^-intercepts, but have the same slope. 



10. The y-intercept. 11. ?* ~ V 1 ; -^. 



Page 88. Art. 55. 

 8. ar\/3 + = 6. 4. 1 



7 = 0. 



Pages 96, 97. Art. 60. 



W i+J-i ; 00 fi+fp i ; (7) ^=1 ; (0 + 



= 3; (7) - - - - = 



VI! Via vis* 



