3 years ago

GEOMETRY Help !! Which term describes the red curve in the figure below?

Mathematics

1 answer:

AleksandrR [38]3 years ago

7 0

It is an elipse
D is the answer

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5 more than a number y is -2

Nata [24]

Answer:

y + 5 = -2

Step-by-step explanation:

That would be y + 5 = -2

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3 years ago

Let u = (1, 2 -2), v= (2, 1, 3) and w = j + 4k. a) Find cos theta, where theta is the angle in degrees between u and w.

vodka [1.7K]

Answer: The value of cos theta is -0.352.

Step-by-step explanation:

Since we have given that

$\vec{u}=1\hat{i}+2\hat{j}-2\hat{k}\and\\\\\vec{w}=\hat{j}+4\hat{k}$

We need to find the cos theta between u and w.

As we know the formula for angle between two vectors.

$\cos\ \theta=\dfrac{\vec{u}.\vec{w}}{\mid u\mid \mid w\mid}$

So, it becomes,

$\cos \theta=\dfrac{2-8}{\sqrt{1^2+2^2+(-2)^2}\sqrt{1^2+4^2}}\\\\\cos \theta=\dfrac{-6}{\sqrt{17}\sqrt{17}}=\dfrac{-6}{17}=-0.352\\\\\theta=\cos^{-1}(\dfrac{-6}{17})=110.66^\circ$

Hence, the value of cos theta is -0.352.

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3 years ago

3.9 times 10 to the 20 power

Jobisdone [24]

3.9*10 = 39 then that to the 20 power is 6.626621133E31

Hope this helps!

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3 years ago

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What is 21/99 in a decimal form

Norma-Jean [14]

Answer:

0.2121~

Step-by-step explanation:

It's a repeating number. 0.0212121212

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4 years ago

Please help me , i don't know this it's 7th grade math

scZoUnD [109]

Answer:

C. 1920

Step-by-step explanation:

25*8*10

1920

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2 years ago

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