2 years ago

10 Points + Brainliest this is half of my points please will mark brainliest

Mathematics

1 answer:

Inessa [10]2 years ago

6 0

Step-by-step explanation:

the answer is in the above image

use the app DESMOS it really helps

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Find the area of the shaded regions. Give your answer as a completely simplified exact value in terms of π (no approximations).

masya89 [10]

Answer:

$40\pi \ m^{2}$

Step-by-step explanation:

we know that

The area of a circle is equal to

$A=\pi r^{2}$

In this problem we have

$r=10\ m$

Substitute and find the area

$A=\pi (10)^{2}=100 \pi\ m^{2}$

Remember that

$360\°$ subtends the area of complete circle

by proportion

Find the area of the shaded regions

The central angle of the shaded regions is equal to $2*72\°=144\°$

$\frac{100\pi }{360} \frac{m^{2}}{degrees} =\frac{x }{144} \frac{m^{2}}{degrees} \\ \\x=144*100\pi /360\\ \\ x=40\pi \ m^{2}$

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2 years ago

If the radius of a circle is 9 cm, how long is the diameter

Anika [276]

Answer:

18 cm

Step-by-step explanation:

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2 years ago

Can someone help me out with these problems and show work please !!

AVprozaik [17]

Answer:

13. 10a^4b²

14. -5y³ + 35y² - 10y

Step-by-step explanation:

Question 13:

(5a³b) (2ab) =

=10a^4b²

Question 14:

5y (-y² + 7y - 2) =

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