2 years ago

Gena wants to estimate the quotient of –21.87 divided by 4.79. Which expression shows the estimate using front-end estimation?

Mathematics

1 answer:

storchak [24]2 years ago

8 0

Answer:

I believe its Negative 21 divided by 5

Step-by-step explanation:

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URGENT! In ABC. what is the value of r?

Bond [772]

Answer:

16.2

Step-by-step explanation:

By geometric mean theorem:

${9}^{2} = 5(x) \\ \\ \implies \: 81 = 5x \\ \\ \implies \: x= \frac{81}{5} \\ \\ \implies \: x=16.2$

3 0

2 years ago

If the radius of circle A is 6 units, calculate the area of the shaded region...

meriva

The formula of an area of a triangle:

$A_{\triangle}=\dfrac{base\cdot height}{2}$

We have:

$\triangle_{FDE}:\ base=height=1\\\triangle_{GDH}:\ base=height=9$

substitute:

$A_{\triangle_{FDE}}=\dfrac{1\cdot1}{2}=0.5\\\\A_{\triangle_{GDH}}=\dfrac{9\cdot9}{2}=40.5$

The formula of an area of a circle:

$A_O=\pi r^2$

We have $r=6$

Substitute:

$A_O=\pi\cdot6^2=36\pi\approx36\cdot3.14=113.04$

The area of the shaded region

$A=A_O-(A_{\triangle_{FDE}}+A_{\triangle_{GDH}})\\\\A=113.04-(0.5+40.5)=113.04-41=72.04\ u^2$

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3 years ago

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soldi70 [24.7K]

Answer:

Step-by-step explanation:

The graph is moved up by 4, that is why it says +4 in the equation

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Answer:

5/2

Step-by-step explanation:

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