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3 years ago

Which equation below is a direct variation?

Mathematics

1 answer:

masya89 [10]3 years ago

5 0

Direct variation is of the form y = kx where k is a constant

So its A

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Find the point on the directed segment from (−3, −2) to (4, 8) that divides it into a ratio of 3: 2

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Answer:

I think this is the correct answer

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3 years ago

Write each expression in radical form.<br> 1. 7²2. 4413

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Step-by-step explanation:

1. $\sqrt{ 7^{2}$ = 7

2. $\sqrt{4413}$ ( doesn't have any simplest radical form)

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Why does dividing by 100 shift each digit two places to the right?

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3 years ago

Which verb form correctly completes the sentence? Jessica __________ one of her longer gowns to wear. A. choosed B. had chose C.

irina1246 [14]

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3 years ago

Read 2 more answers

The sector COB is cut from the circle with center O. The ratio of the area of the sector removed from the whole circle to the ar

mafiozo [28]

Answer:

$Ratio = \frac{R^2 - r^2 }{ r^2}$

Step-by-step explanation:

Given

See attachment for circles

Required

Ratio of the outer sector to inner sector

The area of a sector is:

$Area = \frac{\theta}{360}\pi r^2$

For the inner circle

$r \to radius$

The sector of the inner circle has the following area

$A_1 = \frac{\theta}{360}\pi r^2$

For the whole circle

$R \to Radius$

The sector of the outer sector has the following area

$A_2 = \frac{\theta}{360}\pi (R^2 - r^2)$

So, the ratio of the outer sector to the inner sector is:

$Ratio = A_2 : A_1$

$Ratio = \frac{\theta}{360}\pi (R^2 - r^2) : \frac{\theta}{360}\pi r^2$

Cancel out common factor

$Ratio = R^2 - r^2 : r^2$

Express as fraction

$Ratio = \frac{R^2 - r^2 }{ r^2}$

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2 years ago