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Rom4ik [11]
3 years ago
6

Please Help!!! the picture is below

Mathematics
1 answer:
wariber [46]3 years ago
7 0

Answer:

Step-by-step explanation:

√20 is the correct answer.  It's between 4 and 5, just as 20 is between 4^2 and 5^2 (or 16 and 25).

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butalik [34]

Answer:

350-60

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3 0
2 years ago
Read 2 more answers
F(x)=2x+1/x-1 then f^-1(1)​
olasank [31]

Answer:

  • f⁻¹(x) = (x + 1) / (x - 2)
  • f⁻¹(1 ) = - 2

Step-by-step explanation:

<u>Given function:</u>

  • f(x) = (2x + 1) / (x - 1)

<u>Find its inverse, substitute x with y and f(x) with x, solve for y:</u>

  • x = (2y + 1) / (y - 1)
  • x(y - 1) = 2y + 1
  • xy - x = 2y + 1
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<u>Substitute y with f⁻¹(x):</u>

  • f⁻¹(x) = (x + 1) / (x - 2)

<u>Find  f⁻¹(1 ):</u>

  • f⁻¹(1 ) = ( 1 + 1) / (1 - 2) = 2 / - 1 = - 2
6 0
2 years ago
How Do You Do This ? Please show work .
snow_tiger [21]
So basically you are going to line up your equations (already done). Next, you will just add each term. So x + 3x = 4x, then 2y - 2y = 0 (we wouldn't put anything) then 7 - 3 = 4
So then we have all of our terms figured out and will have 4x = 4 then divide 4x by 4 to get x alone and then you will also divide the four that is by itself by four to equal one. So, your answer is x = 1. I hope that helps!
5 0
3 years ago
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IgorLugansk [536]
The answer is b why because I had did it on the test and I had got it right HOPEFULLY IT HELPS
3 0
3 years ago
Jill can answer 50 math questions every 20 minutes.
Artemon [7]

Answer:

12- 30

36- 90

Step-by-step explanation:

if she can answer 50 in 20 mins then that means she is answering 2.5 questions in 1 min and then you must multiply 2.5 by the number of mins she has making it

12 x 2.5= 30

36 x 2.5= 90

3 0
3 years ago
Read 2 more answers
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