Items 11-15. Lines a, b, c, and d
intersect as shown.

11. Which pairs of lines are parallel?

(a) a and b
(b) a and c
(c) c and d
(d) b and d

12. What is x?

13. What is y?

(a) 37
(b) 84
(c) 88
(d) 92

14. What is z?

(a) 84
(b) 92
(c) 96
(d) 109

15. If the slope of line d is given, the slope of which other line is known?

LEFT SIDE OF PAPER!!