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Nimfa-mama [501]

3 years ago

15

Tomas collects miniature cars. He bought a display case at a cost of $5.95. He also bought 3 miniature cars. If his total cost w

as $11.05, how much did each car cost?

2 answers:

kiruha [24]3 years ago

6 0

The answer should be D

ICE Princess25 [194]3 years ago

3 0

Answer:

D

Step-by-step explanation:

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Tomtit [17]

Answer:

approximation is often useful when it is not a very good one

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2 years ago

Evaluate sin 5pi/4<br> Thank you

kondaur [170]

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Step-by-step explanation:

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2 years ago

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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

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2 years ago

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Tema [17]

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Step-by-step explanation:

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