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2 years ago

40 points :) Please help me

Mathematics

1 answer:

hodyreva [135]2 years ago

4 0

Answer:

Formula for arc length is;

$\frac{\theta}{360}*2\pi r\\$

Step-by-step explanation:

$\frac{\theta}{360}*2\pi r\\$

$\frac{210}{360}*2\pi *11yd$

so arc length is;

$\frac{77\pi }{6}yd$

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Find the multiplicative inverse of 2/3 * - 5/7

boyakko [2]

Answer:

$-\frac{21}{10}$ is the required multiplicative inverse.

Step-by-step explanation:

First of all simplify the given expression.

$\frac{2}{3}\cdot \frac{-5}{7}=-\frac{2\cdot \:5}{3\cdot \:7}=-\frac{10}{21}$

Multiplicative inverse of any number when multiplied gives 1.

The multiplicative inverse of $-\frac{10}{21}$ is $-\frac{21}{10}$ because:

$-\frac{10}{21}\times -\frac{21}{10}=1$

Best Regards!

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3 years ago

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Ber [7]

Answer:

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3 years ago

Robert needs to cut four shelves from a board that is 2.5 meters long. The second shelf is 18 centimeters longer than twice the

USPshnik [31]

1st shelf: 48cm
2nd shelf: 114cm
3rd shelf: 36cm
4th shelf: 52cm
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3 years ago

Please Answer Quickly

Natali5045456 [20]

ANSWER
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EXPLANATION

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3 years ago

Solve each system by substitution.<br> y=-4x-9 y=3x+19

Alekssandra [29.7K]

Answer:

x=-4, y=7

Step-by-step explanation:

According to the first equation, y = -4x - 9, so we can substitute y in the second equation for -4x - 9.

y = 3x + 19

-4x - 9 = 3x + 19

Add 9 to both sides

-4x = 3x + 28

Subtract 3x

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Divide by -7

x = -4

Plugging this into the equation, we have:

y = -4x - 9

y = -4(-4) - 9

y = 16 - 9

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2 years ago