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Maksim231197 [3]
3 years ago
8

MARKING BRAINLIEST!!! PLSS HELP ASAPP!! Plz show all work!!!

Mathematics
2 answers:
kherson [118]3 years ago
8 0

Step-by-step explanation:

Multiply 10 by 10, then find the area of the circle (78.54) then subtract, 100-78.54= 21.46. Then round. So its A. 21.5 meters squared

Alecsey [184]3 years ago
6 0

Answer:

A

Step-by-step explanation:

the area of square is 10²=100

Area of a circle is πr²=π(10/2)²=25π

100-25π=100-25*3.14=100-78.5=21.5

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Find the inverse of the following function. Then prove they are inverses of one another.
solmaris [256]

Answer: \dfrac{x^2+1}{2}

Step-by-step explanation:

Given

f(x)=\sqrt{2x-1}

We can write it as

\Rightarrow y=\sqrt{2x-1}

Express x in terms of y

\Rightarrow y^2=2x-1\\\\\Rightarrow x=\dfrac{y^2+1}{2}

Replace y be x to get the inverse

\Rightarrow f^{-1}(x)=\dfrac{x^2+1}{2}

To prove, it is inverse of f(x). f(f^{-1}(x))=x

\Rightarrow f(f^{-1}(x))=\sqrt{2\times \dfrac{x^2+1}{2}-1}\\\\\Rightarrow f(f^{-1}(x))=\sqrt{x^2+1-1}\\\\\Rightarrow f(f^{-1}(x))=x

So, they are inverse of each other.

8 0
3 years ago
Find the volume of the cylinder when it is 70% full. Use 3.14 for PI and round to the whole number. height 13 radius 7
artcher [175]

Answer:

= 2001.19452

Step-by-step explanation:

V=πr2h=π·72·13≈2001.19452

3 0
3 years ago
What is the simplified form of -(x-4)<br><br> -x-4<br> -x+4<br> X+4<br> X-4<br><br> Show your work
Sphinxa [80]

Answer:

Step-by-step explanation:

X-4

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What is the temperature change if it was -2°C midnight and then the next day the temperature had risen to 9°C
Vlad1618 [11]
The answer to your math problem is 11
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What is the value of y in the solution to the system of equations 5x-y=25 and x+4y=-10
Amiraneli [1.4K]

Answer:

y=-3.571

Step-by-step explanation:

To get rid of the x's make the other x cancel out the other.

5x-y=25+(-5(x+4y=-10)=-21y=75= -3.571

3 0
3 years ago
Read 2 more answers
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