The answer is -40 because if you get rid of the negative sign and add instead of subtract... you get 40 so its like adding in the opposite direction.
-7(x+y=525)-7
3x+7y=2775
-7x-7y=-3675
3x+7y=2775
-4x=-900
X=-900/-4
X=225
Answer is c
Answer:
components: ⟨15, 75⟩, magnitude: about 76
I got this right edge 2020