Vectors

For vector w is true: w = 2u-5v. Determine coordinates of vector w if u=(3, -1), v=(12, -10)

Correct answer:

wx =  -54
wy =  48

Step-by-step explanation:

w=2u−5v=(2⋅3+(−5)⋅12,2⋅(−1)+(−5)⋅(−10))=(−54,48)
wy=(2)⋅ (−1)+(−5)⋅ (−10)=48

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