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Marat540 [252]
3 years ago
15

I really need help on this question:( can anyone help me out real quick

Mathematics
2 answers:
dsp733 years ago
5 0

Answer:

The last answer choice

Step-by-step explanation:

The formula for the area of a circle is \pi r^2, where r represents the radius. In this case, \pi \cdot 20^2=400\pi. Hope this helps!

Misha Larkins [42]3 years ago
4 0

Answer:

400 pie square inches

Step-by-step explanation:

Area of a circle is calculated by pie x radius squared,

so 3.14 x 20 x 20 = 1,256.

400 x 3.14 is equal to 1,256, so thats your answer.

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Which Of the following pairs of functions are inverse of each other?
damaskus [11]

One way is to solve for the inverse of the first function

remember, to solve, replace f(x) or g(x) with y, switch x and y, solve for y and replace it with f^{-1} (x)

A.

f(x)=x/2+8\\y=x/2+8\\x=y/2+8\\x-8=y/2

2x-16=y

f^{-1}=2x-16

nope, not A

<h3>What is the inverse function?</h3>

The inverse function of a function f is a function that undoes the operation of f. The inverse of f exists if and only if f is bijective, and if it exists, is denoted by {\displaystyle f^{-1}.}

B.

f(x)=3x^3+16\\y=3x^3+16x=3y^3+16\\x-16=3y^3\\(x-16)/3=y^3

f^{-1}(x)=\sqrt[3]{((x-16)/3)}

nope, not the same

not B

C.

f(x)=18/x-9\\y=18/x-9\\x=18/y-9\\x+9=18/y\\y(x+9)=18\\y=18/(x+9)\\f^{-1}(x)=18/(x+9)

The correct, answer is C.

To learn more about the inverse function visit:

brainly.com/question/2972832

#SPJ1

5 0
2 years ago
Vita saved $72 last December. This amount represents 2/9 of the total amount she saved last year. What is the total amount Vita
GrogVix [38]
\dfrac{2}{9} \text { of the saving} = \$72

-----------------------------------------------
Find 1/9 :
-----------------------------------------------
\dfrac{1}{9} \text { of the saving} = \$72 \div 2

\dfrac{1}{9} \text { of the saving} = \$36

-----------------------------------------------
Find 9/9 :
-----------------------------------------------
\dfrac{9}{9} \text { of the saving} = \$36 \times 9

\dfrac{9}{9} \text { of the saving} = \$324

-----------------------------------------------
Answer: The total amount is $324.
-----------------------------------------------
7 0
3 years ago
What is the value of x in the equation x – y = 30, when y = 15?
asambeis [7]
X= 45, you would place 15 into y's place, which would give you x-15= 30... then you would add 15 to both sides, which would give you x=45<span />
6 0
3 years ago
Read 2 more answers
What do you do when you must solve a system of equations by elimination but all of the coefficients on the variables are differe
N76 [4]
<span>The coefficients are of no consequence. Just find a way to make it what you want. Please provide an example of what is troubling you and why you think it is trickier than those you already have solved.</span>
3 0
3 years ago
6.Find the smallest whole number 2645 by which it should be divided so as to get perfect square. Also find the square root of th
kondaur [170]

Answer:

Thus, 2645 needs to be divided by 5 to become a perfect square. Thus, the required smallest whole number by which it should be divided so as to get a perfect square number is 5 and the square root is √529= 23.

Step-by-step explanation:

8 0
3 years ago
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