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Len [333]
3 years ago
9

SMARTIES PLEASE HELP

Mathematics
2 answers:
ELEN [110]3 years ago
7 0
1= 5
2=15
3=25
I think I’m not sure tho
bogdanovich [222]3 years ago
4 0
1. 5
2. 15
3. 25
i believe
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Answer:

AB = 2

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Maksim231197 [3]

Step-by-step explanation:

The angle between vectors is given by

\cos{\theta} = \dfrac{\vec{\textbf{a}}\cdot \vec{\textbf{b}}}{|\vec{\textbf{a}}||\vec{\textbf{b}}|}

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|\vec{\textbf{a}}| = \sqrt{a_x^2 + a_y^2 + a_z^2}

\:\:\:\:\:\:\:=\sqrt{(2)^2 +(-5)^2 + (3)^2} = 6.16

|\vec{\textbf{b}}| = \sqrt{b_x^2 + b_y^2 + b_z^2}

\:\:\:\:\:\:\:= \sqrt{(3)^2 + (1)^2 + (4)^2} = 5.10

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Therefore, the angle between the two vectors is

\cos{\theta} = \dfrac{\vec{\textbf{a}}\cdot \vec{\textbf{b}}}{|\vec{\textbf{a}}||\vec{\textbf{b}}|} = \dfrac{13}{(6.16)(5.10)}

or

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