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3 years ago

10

The set {11,12} is equivalent to

1 answer:

musickatia [10]3 years ago

8 0

Answer:

3

Step-by-step explanation:

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Calculate the area of the shaded region.

Nostrana [21]

Let $A$ be the area of the sector in the larger circle (radius 12 cm) whose central angle is subtended by the labeled arc with measure 45 deg, and let $a$ be the area of the sector in the smaller circle (radius 8 cm) with the same central angle. The area you want is $A-a$ .

We have

$\dfrac A{\pi(12\,\mathrm{cm})^2}=\dfrac{45^\circ}{360^\circ}\implies A=18\pi\,\mathrm{cm}^2$

$\dfrac a{\pi(8\,\mathrm{cm})^2}=\dfrac{45^\circ}{360^\circ}\implies a=8\pi\,\mathrm{cm}^2$

So the area of the shaded region is $18\pi-8\pi=10\pi$ .

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3 years ago

Find the perimeter of the square. 5(x+2). x+2(x+8)

erma4kov [3.2K]

Answer:

The length of each of the 4 sides of a square is the same. Then

5x - 8 = 3x

2x = 8

x = 4

5(4) - 8 = 12

3(4) = 12

The length of each side is

L = 4.

The perimeter is 4 times the length.

P = 4L = 4(4) = 16

Step-by-step explanation:

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3 years ago

I need to know the answer to this

Valentin [98]

It is three fourth = 3/4

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VladimirAG [237]

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Step-by-step explanation:

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