3 years ago

Help me with this one please

Mathematics

1 answer:

galben [10]3 years ago

7 0

Answer:

I think the top and the two in the middle but I can't really see it's a blurry picture

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Katyanochek1 [597]

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i don't know.. I think this is what the question is trying to say XD

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I need help, it explains what to do but i still don't get it. ://

Ksju [112]

112-88 = 24

they save $24 per month

so 650/24 = 27.083

so it will pay for itself in 27.083 months, round up to 28 months

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3 years ago

Find a vector 3 units long in the opposite direction from v = 〈3, 1,-4).

lutik1710 [3]

Unit vector along the direction v = <3,1,-4> is :

$\hat{v} = \dfrac{3i + j -4k}{\sqrt{3^2 + 1^2 + 4^2}}\\\\\hat{v} = \dfrac{3i + j -4k}{5.1}$

So, unit vector opposing the $\hat{v}$ is :

$\hat{v'} = -\hat{v}\\\\\hat{v'} = -( \dfrac{3i + j -4k}{5.1})\\\\\hat{v'} = \dfrac{-3i - j +4k}{5.1}$

so, vector of magnitude 3 units in opposite direction from v is :

$\vec{V} = 3\hat{v'}\\\\\vec{V} = \dfrac{3}{5.1}( -3i -j+4k)$

Hence, this is the required solution.

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3 years ago