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OpenStudy (anonymous):
Find the dot product, a • b. a = 6i + 5j, b = -5i + 4j 50 <1, 9> -10 <-30, 20>
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OpenStudy (anonymous):
I thought i knew what i was doing but clearly i didnt.. i put D and was wrong .. please help?
OpenStudy (alekos):
a . b = a1b1 + a2b2
OpenStudy (alekos):
a = a1i + a2j and b = b1i + b2j
OpenStudy (anonymous):
so then it would be 6(-5)+5(4) -30+20 -10
OpenStudy (dumbcow):
correct :)
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OpenStudy (alekos):
you got it!
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