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Gemiola [76]
3 years ago
11

Find a ⋅ b. a = <5, 2>, b = <4, 5>

Mathematics
1 answer:
mariarad [96]3 years ago
7 0

Answer:

The answer is 30  

Step-by-step explanation:

To get a.b  

For a = <wa, za> and b = <wb, zb>, the dot product represents multiplication sign.

We say,  

 a•b = (wa)(wb) + (za)(zb)

The next step is to substitute the given information into the above equation we generated.

Then we say,  

 a•b = 5•4 + 2•5

 a.b = 20 + 10

 a•b = 30

The answer is 30  

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