How do you determine if 2 lines are parallel or perpendicular?
Find slope for both lines. If the slopes =, then the lines are parallel. If the slopes do not =, then multiply them. If the answer (product) = -1, then the lines are perpendicular. If product is not = -1, then the lines are neither parallel nor perpendicular.
How to you add integers that do not have the same sign?
If signs are not the same, then subtract the integers, and take the sign of the larger integer.
How do you convert inches to feet?
Divide inches by 12. 12 inches = 1 foot