Answer:

Step-by-step explanation:


Answer:
C
Step-by-step explanation:
They can't form a triangle because the sum of 2 sidelengths is ALWAYS greater than the 3rd side in a triangle. Because 5+7=12<14, this means that it can't form a triangle.
Answer:
-4
Step-by-step explanation:
Simplify the equation by dividing both numbers by 5. You will get -4/1. A 1 as a denominator is usually ignored.
I hope my answer is right