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Find a ⋅ b. a = <7, 4>, b = <3, 5>
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3 votes
Find a ⋅ b. a = <7, 4>, b = <3, 5>

User Nicolas Forney
by
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2 Answers

2 votes
a · b = 7·3 +4·5 = 21 +20 = 41
User Cyber Avater
by
6.3k points
3 votes
Answer = 41


Step-by-step explanation

a · b is a scalar product.

a = <x₁, y₁> = <7, 4>
x₁ = 7
y₁ = 4

b = <x₂, y₂> = <3, 5>
x₂ = 3
y₂ = 5

a · b = (x₁ * x₂) + (y₁ * y₂)
= (7 * 3) + (4 * 5)
= 21 + 20
= 41

a · b = 41
User Hida
by
6.4k points
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