The answer is 5. If you subtract a negative number, you essentially add.
Not necessarily, the more correct definition is opposite reciprocal slopes.
The example used is how horizontal and vertical lines are parallel. Horizontal lines have a slope of 0, also written as 0/1. However, vertical lines have an undefined slope, which isn't necessarily negative. It has a slope of 1/0, which is undefined. In this case, the reciprocal isn't negative.
In all other cases (1 and -1, 2 and -1/2, etc.) yes, the perpendicular pairs are negative and reciprocal.
Answer:
-9 1/4
Step-by-step explanation:
-5 3/4 - 3 1/2
-5 3/4 - 3 2/4
-9 1/4
Final Answer: 
Steps/Equations:
Question: 
Step 1: Move the negative sign to the left side.
Step 2: Multiply both sides by 
.
Step 3: Simplify 
to 
.
Step 4: Multiply both sides by 
.
~I hope I helped :)~
