Answer:
5
Step-by-step explanation:
f(-4)= -2(-4)-3
=8-3
=5
10 (assuming you meant 5 TIMES 2
Answer:
They are supplement to each other
Answer:

Step-by-step explanation:
Lines form 180 degrees on either side. The negative sign simply implies direction (clockwise instead of counter-clockwise), which is negligible as 180 is exactly half of 360 so you'd form the same line.
1) both have positives signs OR
2) both have negatives signs