3 years ago

Help me please ill give points and stuff

Mathematics

1 answer:

zheka24 [161]3 years ago

3 0

Answer:

The third one I have a formula sheet

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Sedbober [7]

put in an positive number for x and check

2 - 5 = -3

5 - 2 = 3

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so the only different one is the first

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kotegsom [21]

Note:
The area of a circle with radius r is πr².
An entire circle has a central angle of 360°.

For the sector with radius = (3+4) = 7cm and a central angle of 120°, the area is
$A_{1}= \frac{120}{360}*(49 \pi ) = \frac{49}{3} \pi \, cm^{2}$

For the sector with radius = 3 cm and a central angle of 120°. the area is
$A_{2}= \frac{120}{360} *(9 \pi ) = 3 \pi \, cm^{2}$

The area of the shaded sector (see the figure) is
$A=A_{1}-A_{2} = ( \frac{49}{3} -3) \pi = \frac{40}{3} \pi \, cm^{2}$

Answer: $\frac{40}{3} \pi \, cm^{2}$

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Step-by-step explanation:

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