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3 years ago

I need help plsssssss❤️❤️

Mathematics

1 answer:

Bas_tet [7]3 years ago

6 0

Answer:

you need a brain

Step-by-step explanation:

thx for the points

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Ratio of boys to girls is 2:7. There are 250 more girls than boys. How many boys are there

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4 years ago

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Find the angle between u = (8.- 3) and v = (-3,- 8) Round to the nearest tenth of a degree.

Nimfa-mama [501]

Answer:

Step-by-step explanation:

First you must calculate the module or the magnitude of both vectors

The module of u is:

$|u|=\sqrt{(8)^2 + (-3)^2} \\\\|u|=\sqrt{64 + 9}\\\\|u|=8.544$

The module of v is:

$|v|=\sqrt{(-3)^2 + (-8)^2} \\\\|u|=\sqrt{9 + 64}\\\\|u|=8.544$

Now we calculate the scalar product between both vectors

$u*v = 8*(-3) + (-3)*(-8)\\\\u*v = -24+ 24=0$

Finally we know that the scalar product of two vectors is equal to:

$u*v = |u||v|*cos(\theta)$

Where $\theta$ is the angle between the vectors u and v. Now we solve the equation for $\theta$

$0 = 8.544*8.544*cos(\theta)\\\\0 = cos(\theta)\\\\\theta= arcos(0)\\\\\theta=90\°$

the answer is 90°

Whenever the scalar product of two vectors is equals to zero it means that the angle between them is 90 °

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4 years ago

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Write an equation of the line below<br> (0,-4) and (5,-6)

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What kind of equation?

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3 years ago

Simplify x to the third power over x

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X^3/x (I hope this is what you mean)
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Then we divide three x to one x.
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Hi lol I don’t understand you’re question I need more context

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