snt44460 snt44460

30-03-2018
Mathematics

contestada

find the dot product of v=-7i+4j and w=-6+5j

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sqdancefan sqdancefan

30-03-2018

v•w = (-7i +4j)•(-6i +5j) = (-7)×(-6) +4×5 = 42 +20
v•w = 62

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