Find a ⋅ b. a = <7, 4>, b = <3, 5>

Question

asked Jan 18, 2019 173k views

2 Answers

Hida · Answer 1 · 2019-01-23T10:48:59+0000

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

Find a ⋅ b. a = <7, 4>, b = <3, 5>

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