Either BOD or AOD
Hope this helps c:
Answer:
We can determine from their equations whether two lines are parallel by comparing their slopes. If the slopes are the same and the y-intercepts are different, the lines are parallel. If the slopes are different, the lines are not parallel. Unlike parallel lines, perpendicular lines do intersect
Answer:
9r
Step-by-step explanation:
Multiply 9 and r together.
