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raketka [301]
2 years ago
5

Find a ⋅ b. a = 9i + 5j, b = 4i + 3j

Mathematics
2 answers:
aksik [14]2 years ago
4 0

Answer:

Step-by-step explanation:

51

<13, 8>

<36, 15>

-21

N76 [4]2 years ago
3 0
9i+5j x 4i+3j
Factor
=9i+20ij+3j
= (9+20j)i+3j
=3j+(9+20j)i =answer
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