Q22. Tracy can wallpaper 2 rooms in a new house in 8 hours. Together with her trainee they can wallpaper the 2 rooms in 6 hours. How long would it take the trainee working by herself to do the job?

a. 8 hr

b. 30 hr

c. 22 hr

d. 44 hr

Q23. Find the slope of the line containing the points (-7, 1) and (-8, -5).

a. -1/6

b. -6

c. 1/6

d. 6