thatguy69420 thatguy69420

07-05-2019
Mathematics

contestada

find a • b. u = <8,7>, v=<9,7>

Respuesta :

07-07-2019

Answer:

[tex]\large\boxed{\vec{u}\circ\vec{v}=121}[/tex]

Step-by-step explanation:

[tex]\vec{a}=<x_a,\ y_a>,\ \vec{b}=<x_b,\ y_b>\\\\\vec{a}\circ\vec{b}=x_ax_b+y_ay_b\\\\====================================\\\\\vec{u}=<8,\ 7>,\ \vec{v}=<9,\ 7>\\\\\vec{u}\circ\vec{v}=(8)(9)+(7)(7)=72+49=121[/tex]

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