Step-by-step explanation:

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Answer:
The question is imcomplete.
Step-by-step explanation:
There is no zoom link or real question.
Step-by-step explanation:
-7x + 2y = 18
6x + 6y = 0
21x - 6y = - 54
6x + 6y = 0
27x = -54
x = -2
6(-2) + 6y = 0
-12 + 6y = 0
6y = 12
y = 2
(-2,2)
Answer:
1. The unit or resistance is Omega
2. The symbol is Ω