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3 years ago

Add the following- 3/5,- 7/10and 4/15

Mathematics

1 answer:

maxonik [38]3 years ago

4 0

Answer:

-31/30

Step-by-step explanation:

-3/5 - 7/10 + 4/15 = -31/30

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3 years ago

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

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

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

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

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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3 years ago

The complement of an angle measures 20 more than the angle. Find the number of degrees in the angle

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Let the measure of its complement be x°.
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3 years ago

Add the following- 3/5,- 7/10and 4/15​

Add the following- 3/5,- 7/10and 4/15