Rewrite the equation;
3x-y=3
3x-3=y
Linear equation.
I'm unsure of what the second part asks. Can you rewrite the given question?
Answer:

Step-by-step explanation:
The Law of Cosines gives an immediate result. No translation to Cartesian coordinates is necessary. That law makes use of the angle between the vectors, u2-u1

Answer:
you are correct
Step-by-step explanation:
area = 6 × 3 = 18 in²