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OpenStudy (anonymous):
Find a ⋅ b. a = 9i + 5j, b = 4i + 3j
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OpenStudy (anonymous):
51 <13, 8> <36, 15> -21
OpenStudy (anonymous):
@Chlorophyll @phi
OpenStudy (phi):
same idea. a= 9i+5j is another way to write a vector (9,5)
OpenStudy (anonymous):
and to find b?
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