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Mathematics 15 Online
OpenStudy (anonymous):

Find a • b. (5 points) a = 5i + 7j, b = -4i + 3j <1, 10> <-20, 21> 1 41

OpenStudy (freckles):

a dot b?

OpenStudy (freckles):

\[<u,v> \cdot <x,y>=ux+vy\]

OpenStudy (anonymous):

so is si -20,21?

OpenStudy (anonymous):

@freckles

ganeshie8 (ganeshie8):

-20 + 21

ganeshie8 (ganeshie8):

simplify

OpenStudy (anonymous):

? so thats the answer right? @ganeshie8

ganeshie8 (ganeshie8):

Yes -20+21 = ?

OpenStudy (anonymous):

1

OpenStudy (anonymous):

@ganeshie8

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