3 years ago

The__________ method is a way of solving a system of equations using addition or subtraction to eliminate a variable.

Mathematics

1 answer:

Mandarinka [93]3 years ago

8 0

The anwer is like term

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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.

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2 years ago

PLEASE HELP ASAP!!!!

Paul [167]

Answer:

the answers are <u>B and D </u>

Step-by-step explanation:

please let me know if I am wrong

I found about the answers by determine bias questions from non bias questions.

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3 years ago

"5 more than 3 times a number" translates to an equation is it true or false ?

lozanna [386]

Answer:

3n + 5

Step-by-step explanation:

what do u mean by is it true or false?

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2 years ago

Help please this is also do very very soon thank you!!!

stepan [7]

Answer:

700

Step-by-step explanation:

100:2

???:14

14*100

=1400

1400/2

=700

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2 years ago

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Is it a rhombus or is it just a parallelogram?

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